CVE-2020-11945

NameCVE-2020-11945
DescriptionAn issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-4682-1
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
squid (PTS)buster4.6-1+deb10u1vulnerable
buster (security)4.6-1+deb10u2fixed
bullseye4.11-2fixed
sid4.11-5fixed
squid3 (PTS)jessie3.4.8-6+deb8u5vulnerable
jessie (security)3.4.8-6+deb8u9vulnerable
stretch (security), stretch3.5.23-5+deb9u1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
squidsource(unstable)4.11-1
squidsourcebuster4.6-1+deb10u2DSA-4682-1
squid3source(unstable)(unfixed)

Notes

http://www.squid-cache.org/Advisories/SQUID-2020_4.txt
Squid 4: http://www.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch

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