CVE-2023-50269

highpriority · attend · 50EPSS 0.576 · 99 %ileDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

57.6% (99th) EPSS

CVSS 7.5 · high

Is it mine?

55 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.

remediations

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

A vendor fix is available.

Fixedsquid-7:5.5-5.el9_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-7:5.5-5.el9_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-7:5.5-5.el9_2.4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-7:5.5-5.el9_2.4.src as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-7:5.5-5.el9_2.4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-debuginfo-7:5.5-5.el9_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-debuginfo-7:5.5-5.el9_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-debuginfo-7:5.5-5.el9_2.4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-debuginfo-7:5.5-5.el9_2.4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-debugsource-7:5.5-5.el9_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-debugsource-7:5.5-5.el9_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-debugsource-7:5.5-5.el9_2.4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-debugsource-7:5.5-5.el9_2.4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1085
Fixedsquid-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-7:3.5.20-17.el7_9.10.src as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-7:3.5.20-17.el7_9.10.src as a component of Red Hat Enterprise Linux Workstation (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-debuginfo-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-migration-script-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-migration-script-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-migration-script-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-migration-script-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-migration-script-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-sysvinit-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-sysvinit-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-sysvinit-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-sysvinit-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Fixedsquid-sysvinit-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)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 this update, the squid service will be restarted automatically.
https://access.redhat.com/errata/RHSA-2024:1787
Workaroundsquid-7:5.5-5.el9_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:5.5-5.el9_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:5.5-5.el9_2.4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:5.5-5.el9_2.4.src as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:5.5-5.el9_2.4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:5.5-5.el9_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:5.5-5.el9_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:5.5-5.el9_2.4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:5.5-5.el9_2.4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debugsource-7:5.5-5.el9_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debugsource-7:5.5-5.el9_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debugsource-7:5.5-5.el9_2.4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debugsource-7:5.5-5.el9_2.4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.2)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:3.5.20-17.el7_9.10.src as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:3.5.20-17.el7_9.10.src as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-debuginfo-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-migration-script-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-migration-script-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-migration-script-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-migration-script-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-migration-script-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-sysvinit-7:3.5.20-17.el7_9.10.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-sysvinit-7:3.5.20-17.el7_9.10.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-sysvinit-7:3.5.20-17.el7_9.10.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-sysvinit-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.
Workaroundsquid-sysvinit-7:3.5.20-17.el7_9.10.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf
Remove all "follow_x_forwarded_for" lines from squid.conf.

cvss

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

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode

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

v3.18.6highAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 4

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Hsecondary · 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

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-674USCWE-674USCWE-674US

affected products (55)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Open Source CentOSall versionscert_bundDEcpe:/o:centos:centos:-
Open Source Squid <6.6all versionscert_bundDE
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Open Source Squid< 6.6cert_bundDE
squid-cache squid≤ 2.6, ≤ 2.7.STABLE9enisa_euvdEU
squid-cache squid≤ 3.1, ≤ 5.9enisa_euvdEU
squid-cache squid6.0.1, → 6.6enisa_euvdEU
Squid Software Foundation Squid2.6 → 2.7.STABLE9fstec_bduRU
Squid Software Foundation Squid3.1 → 5.9fstec_bduRU
Squid Software Foundation Squid6.0.1 → 6.5.0fstec_bduRU
АО «ИВК» АЛЬТ СП 10all versionsfstec_bduRU
АО «ИВК» Альт 8 СПall versionsfstec_bduRU
АО «НППКТ» ОСОН ОСнова Оnyx≤ 2.10fstec_bduRU
АО «НТЦ ИТ РОСА» РОСА Кобальт≤ 7.9fstec_bduRU

showing 20 of 55

advisories (3)

Vendor and ecosystem advisories describing this.

RHSA-2024:1085Red Hat Security Advisory: squid security update2024-03-05csaf · redhat_csafUS
An update for squid is now available for Red Hat Enterprise Linux 9.2 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.
RHSA-2024:1787Red Hat Security Advisory: squid security update2024-04-11csaf · redhat_csafUS
An update for squid is now available for Red Hat Enterprise Linux 7. 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.
WID-SEC-W-2023-3150Squid: Schwachstelle ermöglicht Denial of ServiceDeutsch2023-12-13csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Squid ausnutzen, um einen Denial of Service Angriff durchzuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund redhat_csaf NVD CVE.org MITRE

published 2023-12-14modified 2026-06-17

references (21)

External citations — patches, advisories, analysis.

scry

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