CVE-2021-33620

Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 99%
Affected Products (NVD)
VendorProductVersion
squid-cachesquid
𝑥
< 4.15
squid-cachesquid
5.0 ≤
𝑥
< 5.0.6
debiandebian_linux
9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
squid
bookworm
5.7-2+deb12u2
fixed
bookworm (security)
5.7-2+deb12u2
fixed
bullseye
4.13-10+deb11u3
fixed
bullseye (security)
4.13-10+deb11u3
fixed
sid
6.12-1
fixed
trixie
6.12-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
squid
bionic
dne
focal
Fixed 4.10-1ubuntu1.4
released
groovy
Fixed 4.13-1ubuntu2.2
released
hirsute
Fixed 4.13-1ubuntu4.1
released
impish
Fixed 4.13-10ubuntu1
released
jammy
Fixed 4.13-10ubuntu1
released
kinetic
Fixed 4.13-10ubuntu1
released
lunar
Fixed 4.13-10ubuntu1
released
mantic
Fixed 4.13-10ubuntu1
released
noble
Fixed 4.13-10ubuntu1
released
trusty
dne
xenial
dne
squid3
bionic
Fixed 3.5.27-1ubuntu1.11
released
focal
dne
groovy
dne
hirsute
dne
impish
dne
jammy
dne
kinetic
dne
lunar
dne
mantic
dne
noble
dne
trusty
dne
xenial
needed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
squid
Amazon Linux 1
7:3.5.20-17.44.amzn1
fixed
Amazon Linux 2
7:3.5.20-17.amzn2.7.2
fixed
squid-debuginfo
Amazon Linux 1
7:3.5.20-17.44.amzn1
fixed
Amazon Linux 2
7:3.5.20-17.amzn2.7.2
fixed
squid-migration-script
Amazon Linux 1
7:3.5.20-17.44.amzn1
fixed
Amazon Linux 2
7:3.5.20-17.amzn2.7.2
fixed
squid-sysvinit
Amazon Linux 2
7:3.5.20-17.amzn2.7.2
fixed
Common Weakness Enumeration
References
http://seclists.org/fulldisclosure/2023/Oct/14
http://www.openwall.com/lists/oss-security/2023/10/11/3
http://www.squid-cache.org/Versions/v4/changesets/squid-4-1e05a85bd28c22c9ca5d3ac9f5e86d6269ec0a8c.patch
http://www.squid-cache.org/Versions/v5/changesets/squid-5-8af775ed98bfd610f9ce762fe177e01b2675588c.patch
https://github.com/squid-cache/squid/security/advisories/GHSA-572g-rvwr-6c7f
https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/
http://seclists.org/fulldisclosure/2023/Oct/14
http://www.openwall.com/lists/oss-security/2023/10/11/3
http://www.squid-cache.org/Versions/v4/changesets/squid-4-1e05a85bd28c22c9ca5d3ac9f5e86d6269ec0a8c.patch
http://www.squid-cache.org/Versions/v5/changesets/squid-5-8af775ed98bfd610f9ce762fe177e01b2675588c.patch
https://github.com/squid-cache/squid/security/advisories/GHSA-572g-rvwr-6c7f
https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/