CVE-2019-12519

NameCVE-2019-12519
DescriptionAn issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2278-1, DSA-4682-1, ELA-271-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
squid (PTS)buster4.6-1+deb10u7fixed
buster (security)4.6-1+deb10u10fixed
bullseye4.13-10+deb11u2fixed
bullseye (security)4.13-10+deb11u3fixed
bookworm5.7-2fixed
bookworm (security)5.7-2+deb12u1fixed
trixie6.6-1fixed
sid6.8-1fixed
squid3 (PTS)jessie, jessie (lts)3.5.23-5+deb8u7fixed
stretch (security)3.5.23-5+deb9u7fixed
stretch (lts), stretch3.5.23-5+deb9u10fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
squidsourcewheezy(unfixed)end-of-life
squidsourcebuster4.6-1+deb10u2DSA-4682-1
squidsource(unstable)4.11-1
squid3sourcewheezy(unfixed)end-of-life
squid3sourcejessie3.5.23-5+deb8u1ELA-271-1
squid3sourcestretch3.5.23-5+deb9u2DLA-2278-1
squid3source(unstable)(unfixed)

Notes

http://www.squid-cache.org/Advisories/SQUID-2019_12.txt
Squid 4: http://www.squid-cache.org/Versions/v4/changesets/squid-4-fdd4123629320aa1ee4c3481bb392437c90d188d.patch

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