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CVE-2021-28652

Published: 27 May 2021

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to incorrect parser validation, it allows a Denial of Service attack against the Cache Manager API. This allows a trusted client to trigger memory leaks that. over time, lead to a Denial of Service via an unspecified short query string. This attack is limited to clients with Cache Manager API access privilege.

Priority

Low

CVSS 3 base score: 4.9

Status

Package Release Status
squid
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (4.10-1ubuntu1.4)
groovy
Released (4.13-1ubuntu2.2)
hirsute
Released (4.13-1ubuntu4.1)
impish
Released (4.13-10ubuntu1)
jammy
Released (4.13-10ubuntu1)
trusty Does not exist

upstream
Released (4.15,4.13-10)
xenial Does not exist

squid3
Launchpad, Ubuntu, Debian
bionic
Released (3.5.27-1ubuntu1.11)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Needs triage

xenial Ignored

Notes

AuthorNote
mdeslaur
this issue only affects the Cache Manager, which is usually
restricted to trusted clients only.
The patch is intrusive to backport to 3.x versions, so we will
not be fixing this issue in older releases. We recommend setting
appropriate access control to limit connections from trusted
clients.

References

Bugs