CVE-2019-12519

Published: 15 April 2020

An 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.

Priority

Medium

CVSS 3 base score: 9.8

Status

Package Release Status
squid
Launchpad, Ubuntu, Debian
Upstream
Released (4.11)
Ubuntu 20.10 (Groovy Gorilla)
Released (4.10-1ubuntu2)
Ubuntu 20.04 LTS (Focal Fossa)
Released (4.10-1ubuntu1.1)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Patches:
Upstream: http://www.squid-cache.org/Versions/v4/changesets/squid-4-fdd4123629320aa1ee4c3481bb392437c90d188d.patch
squid3
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.10 (Groovy Gorilla) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (3.5.27-1ubuntu1.6)
Ubuntu 16.04 LTS (Xenial Xerus)
Released (3.5.12-1ubuntu7.11)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist