CVE-2020-1730

mediumpriority · track · 22EPSS 0.031 · 88 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.14% (88th) EPSS

CVSS 5 · medium

Is it mine?

60 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-28

A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedlibssh-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-0:0.9.4-2.el8.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-config-0:0.9.4-2.el8.noarch as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debuginfo-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-debugsource-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-devel-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-devel-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-devel-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-devel-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedlibssh-devel-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2020:4545
Fixedredhat-virtualization-host-0:4.4.3-20201116.0.el8_3.src as a component of Red Hat Virtualization 4 Hypervisor for RHEL 8redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHSA-2020:5218
Fixedredhat-virtualization-host-image-update-0:4.4.3-20201116.0.el8_3.noarch as a component of Red Hat Virtualization 4 Hypervisor for RHEL 8redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHSA-2020:5218
Workaroundlibssh-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-0:0.9.4-2.el8.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-config-0:0.9.4-2.el8.noarch as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debuginfo-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-debugsource-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-devel-0:0.9.4-2.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-devel-0:0.9.4-2.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-devel-0:0.9.4-2.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-devel-0:0.9.4-2.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundlibssh-devel-0:0.9.4-2.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundimgbased-0:1.2.13-0.1.el8ev.noarch as a component of RHEL 8-based RHEV-H for RHEV 4 (build requirements)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundimgbased-0:1.2.13-0.1.el8ev.src as a component of RHEL 8-based RHEV-H for RHEV 4 (build requirements)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundpython3-imgbased-0:1.2.13-0.1.el8ev.noarch as a component of RHEL 8-based RHEV-H for RHEV 4 (build requirements)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundredhat-release-virtualization-host-0:4.4.3-1.el8ev.src as a component of RHEL 8-based RHEV-H for RHEV 4 (build requirements)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundredhat-release-virtualization-host-0:4.4.3-1.el8ev.x86_64 as a component of RHEL 8-based RHEV-H for RHEV 4 (build requirements)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundredhat-virtualization-host-0:4.4.3-20201116.0.el8_3.src as a component of Red Hat Virtualization 4 Hypervisor for RHEL 8redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundredhat-virtualization-host-image-update-0:4.4.3-20201116.0.el8_3.noarch as a component of Red Hat Virtualization 4 Hypervisor for RHEL 8redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.
Workaroundredhat-virtualization-host-image-update-placeholder-0:4.4.3-1.el8ev.noarch as a component of RHEL 8-based RHEV-H for RHEV 4 (build requirements)redhat_csaf
Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · secalert@redhat.com USexploitability 3.9 · impact 1.4

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-476USprimaryCWE-400USCWE-476US

affected products (60)

Products and version ranges known to be affected.

IBM InfoSphere Information Serverall versionscert_bundDEcpe:/a:ibm:infosphere_information_server:-
IBM QRadar SIEM 7.3all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.3
IBM QRadar SIEM 7.4all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.4
IBM QRadar SIEM 7.5.0all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.5.0
Red Hat libssh≤ libssh versions before 0.9.4enisa_euvdEU
Red Hat libssh≤ libssh versions before 0.8.9enisa_euvdEU
Canonical Ltd. Ubuntu≤ 18.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 19.10fstec_bduRU
Fedora Project Fedora≤ 32fstec_bduRU
Fedora Project Fedora≤ 31fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.1fstec_bduRU
Novell Inc. SUSE Linux Enterprise Module for Basesystem≤ 15 SP1fstec_bduRU
Novell Inc. SUSE Linux Enterprise Module for Open Buildservice Development Tools≤ 15 SP1fstec_bduRU
Novell Inc. SUSE Linux Enterprise Server for SAP Applications≤ 12 SP5fstec_bduRU
Novell Inc. SUSE Linux Enterprise Software Development Kit≤ 12 SP5fstec_bduRU
Novell Inc. Suse Linux Enterprise Server≤ 12 SP5fstec_bduRU
Oracle Corp. MySQL Workbench8.0.0 → 8.0.21fstec_bduRU
Сообщество свободного программного обеспечения libssh≤ 0.9.4fstec_bduRU
Сообщество свободного программного обеспечения libssh≤ 0.8.9fstec_bduRU
canonical ubuntu linux= 18.04nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*

showing 20 of 60

advisories (6)

Vendor and ecosystem advisories describing this.

RHSA-2020:4545Red Hat Security Advisory: libssh security, bug fix, and enhancement update2020-11-04csaf · redhat_csafUS
An update for libssh is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
RHSA-2020:5218Red Hat Security Advisory: Red Hat Virtualization security, bug fix, and enhancement update2020-11-24csaf · redhat_csafUS
An update for imgbased, redhat-release-virtualization-host, and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
WID-SEC-W-2024-0439libssh: Schwachstelle ermöglicht Denial of ServiceDeutsch2020-04-08csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libssh ausnutzen, um einen Denial of Service Angriff durchzuführen.
WID-SEC-W-2024-3377Dell PowerProtect Data Domain: Mehrere SchwachstellenDeutsch2024-11-07csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in Dell PowerProtect Data Domain ausnutzen, um seine Privilegien zu erhöhen, Informationen offenzulegen und um nicht näher beschriebene Auswirkungen zu erzielen.
WID-SEC-W-2025-0227IBM QRadar SIEM: Mehrere SchwachstellenDeutsch2021-11-30csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um seine Privilegien zu erweitern, Administratorrechte zu erlangen, beliebigen Programmcode auszuführen, Informationen offenzulegen, Dateien zu manipulieren oder Sicherheitsvorkehrungen zu umgehen.
WID-SEC-W-2026-0205Oracle MySQL: Mehrere SchwachstellenDeutsch2020-10-20csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle MySQL ausnutzen, um die Verfügbarkeit, Vertraulichkeit und Integrität zu gefährden.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd redhat_csaf NVD CVE.org MITRE

published 2020-04-13modified 2026-06-17

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references (50)

External citations — patches, advisories, analysis.

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