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CVE-2021-31806

Published: 27 May 2021

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a memory-management bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy) via HTTP Range request processing.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
squid
Launchpad, Ubuntu, Debian
impish
Released (4.13-10ubuntu1)
jammy
Released (4.13-10ubuntu1)
kinetic
Released (4.13-10ubuntu1)
lunar
Released (4.13-10ubuntu1)
bionic Does not exist

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

xenial Does not exist

upstream
Released (4.15,4.13-10)
mantic
Released (4.13-10ubuntu1)
Patches:
upstream: http://www.squid-cache.org/Versions/v4/changesets/squid-4-e7cf864f938f24eea8af0692c04d16790983c823.patch
upstream: https://github.com/squid-cache/squid/commit/e7cf864f938f24eea8af0692c04d16790983c823
squid3
Launchpad, Ubuntu, Debian
impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

trusty Does not exist

upstream Needs triage

xenial Needed

bionic
Released (3.5.27-1ubuntu1.11)
mantic Does not exist

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H