CVE-2022-23094

mediumpriority · track · 31EPSS 0.025 · 85 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.54% (85th) EPSS

CVSS 5 · medium

Is it mine?

31 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-28

Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted IKEv1 packet because pluto/ikev1.c wrongly expects that a state object exists. This is fixed in 4.6.

remediations

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

A vendor fix is available.

Fixedlibreswan-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-0:4.4-4.el8_5.src 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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-debuginfo-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-debuginfo-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-debuginfo-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-debuginfo-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-debugsource-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-debugsource-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-debugsource-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-debugsource-0:4.4-4.el8_5.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
https://access.redhat.com/errata/RHSA-2022:0199
Fixedlibreswan-0:4.3-6.el8_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-0:4.3-6.el8_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-0:4.3-6.el8_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-0:4.3-6.el8_4.src as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-0:4.3-6.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-debuginfo-0:4.3-6.el8_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-debuginfo-0:4.3-6.el8_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-debuginfo-0:4.3-6.el8_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-debuginfo-0:4.3-6.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-debugsource-0:4.3-6.el8_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-debugsource-0:4.3-6.el8_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-debugsource-0:4.3-6.el8_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Fixedlibreswan-debugsource-0:4.3-6.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)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
https://access.redhat.com/errata/RHSA-2022:0239
Workaroundlibreswan-0:4.4-4.el8_5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-0:4.4-4.el8_5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-0:4.4-4.el8_5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-0:4.4-4.el8_5.src as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-0:4.4-4.el8_5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debuginfo-0:4.4-4.el8_5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debuginfo-0:4.4-4.el8_5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debuginfo-0:4.4-4.el8_5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debuginfo-0:4.4-4.el8_5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debugsource-0:4.4-4.el8_5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debugsource-0:4.4-4.el8_5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debugsource-0:4.4-4.el8_5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debugsource-0:4.4-4.el8_5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-0:4.3-6.el8_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-0:4.3-6.el8_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-0:4.3-6.el8_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-0:4.3-6.el8_4.src as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-0:4.3-6.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debuginfo-0:4.3-6.el8_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debuginfo-0:4.3-6.el8_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debuginfo-0:4.3-6.el8_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debuginfo-0:4.3-6.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debugsource-0:4.3-6.el8_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debugsource-0:4.3-6.el8_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debugsource-0:4.3-6.el8_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.
Workaroundlibreswan-debugsource-0:4.3-6.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)redhat_csaf
If all configured connections are using IKEv2, the IKEv1 subsystem can be disabled by adding the option ikev1-policy=drop to the "config setup" section of ipsec.conf. Alternatively, libreswan can be compiled with USE_IKEv1=false. If all remote peers are on static IP addresses, a firewall rule blocking UDP port 500 and 4500 can be installed to prevent attackers from sending packets to the pluto IKE daemon. If peers appear on dynamic IP addresses and IKEv1 connections must be supported, then no workarounds are known, and libreswan must be updated or patched.

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 · 5–7.5

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

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-476USprimaryCWE-476US

affected products (31)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
debian debian linux= 10.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
fedoraproject fedora= 34nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
fedoraproject fedora= 35nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
libreswan libreswan4.2 → 4.6nvdUScpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*
libreswan-0:4.3-6.el8_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)all versionsfixedredhat_csafUS
libreswan-0:4.3-6.el8_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)all versionsfixedredhat_csafUS
libreswan-0:4.3-6.el8_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)all versionsfixedredhat_csafUS
libreswan-0:4.3-6.el8_4.src as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)all versionsfixedredhat_csafUS
libreswan-0:4.3-6.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)all versionsfixedredhat_csafUS
libreswan-0:4.4-4.el8_5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
libreswan-0:4.4-4.el8_5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
libreswan-0:4.4-4.el8_5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
libreswan-0:4.4-4.el8_5.src as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
libreswan-0:4.4-4.el8_5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:4.3-6.el8_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:4.3-6.el8_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:4.3-6.el8_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:4.3-6.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.8.4)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:4.4-4.el8_5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS

showing 20 of 31

advisories (2)

Vendor and ecosystem advisories describing this.

RHSA-2022:0199Red Hat Security Advisory: libreswan security update2022-01-19csaf · redhat_csafUS
An update for libreswan is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. 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-2022:0239Red Hat Security Advisory: libreswan security update2022-01-24csaf · redhat_csafUS
An update for libreswan is now available for Red Hat Enterprise Linux 8.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. 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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd redhat_csaf NVD CVE.org MITRE

published 2022-01-15modified 2026-06-17

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references (30)

External citations — patches, advisories, analysis.

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