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CVE-2021-28651

Published: 27 May 2021

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.

Priority

Medium

Cvss 3 Severity Score

7.5

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

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

mantic
Released (4.13-10ubuntu1)
Patches:
upstream: http://www.squid-cache.org/Versions/v4/changesets/squid-4-a975fd5aedc866629214aaaccb38376855351899.patch
upstream: https://github.com/squid-cache/squid/commit/a975fd5aedc866629214aaaccb38376855351899
squid3
Launchpad, Ubuntu, Debian
impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

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

groovy Does not exist

hirsute Does not exist

trusty Does not exist

upstream Needs triage

xenial Needed

mantic Does not exist

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H