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CVE-2023-49288

Fixed in a distro release EPSS 5%CVSS 8.6

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsed_forwarding on" are vulnerable. Configurations with "collapsed_forwarding off" or without a "collapsed_forwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.

Published 2023-12-04 · CVE record · OSV

Products: squid-cache squid

Distro releases

ReleasePackageFixed in
Alpine 3.19squid6.1-r0
Alpine 3.20squid6.1-r0
Alpine 3.21squid6.1-r0
Alpine 3.22squid6.1-r0
Alpine 3.23squid6.1-r0
Alpine 3.24squid6.1-r0
Debian 12squidno fix
Debian 13squid6.1-1
Debian 14squid6.1-1
Red Hat Enterprise Linux 8libecap0:1.0.1-2.module+el8.9.0+19703+a1da7223
Red Hat Enterprise Linux 8libecap-debuginfo0:1.0.1-2.module+el8.9.0+19703+a1da7223
Red Hat Enterprise Linux 8libecap-debugsource0:1.0.1-2.module+el8.9.0+19703+a1da7223
Red Hat Enterprise Linux 8libecap-devel0:1.0.1-2.module+el8.9.0+19703+a1da7223
Red Hat Enterprise Linux 8squid7:4.15-7.module+el8.9.0+20806+014d88aa.3
Red Hat Enterprise Linux 8squid-debuginfo7:4.15-7.module+el8.9.0+20806+014d88aa.3
Red Hat Enterprise Linux 8squid-debugsource7:4.15-7.module+el8.9.0+20806+014d88aa.3
Red Hat Enterprise Linux 9squid7:5.5-6.el9_3.2
Red Hat Enterprise Linux 9squid-debuginfo7:5.5-6.el9_3.2
Red Hat Enterprise Linux 9squid-debugsource7:5.5-6.el9_3.2
Ubuntu 20.04 LTSsquid4.10-1ubuntu1.12
Ubuntu 20.04 LTSsquid4.10-1ubuntu1.10
Ubuntu 20.04 LTSsquid4.10-1ubuntu1.11
Ubuntu 22.04 LTSsquid5.7-0ubuntu0.22.04.4
Ubuntu Pro 16.04 LTSsquid3no fix
Ubuntu Pro 18.04 LTSsquid3no fix
openSUSE Tumbleweedsquid6.6-2.1