Bug 1962246 (CVE-2021-28652)

Summary:	CVE-2021-28652 squid: denial of service issue in Cache Manager
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anon.amish, code, icesalov, jonathansteffan, luhliari
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	squid 4.15, squid 5.0.6	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Squid. A parser validation bug could allow a trusted client with Cache Manager API access privileges to trigger memory leaks, potentially resulting in a denial of service against Squid. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-09 18:53:44 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1963363, 1963364, 1963365
Bug Blocks:	1959539

Description Mauro Matteo Cascella 2021-05-19 15:10:31 UTC

Due to an incorrect parser validation bug Squid is vulnerable to a Denial of Service attack against the Cache Manager API. This problem allows a trusted client to trigger memory leaks which over time lead to a Denial of Service against Squid and the machine it is operating on. This attack is limited to clients with Cache Manager API access privilege.

Upstream security advisory:
https://github.com/squid-cache/squid/security/advisories/GHSA-m47m-9hvw-7447

Comment 1 Mauro Matteo Cascella 2021-05-22 17:34:35 UTC

Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1963363]

Comment 3 Mauro Matteo Cascella 2021-05-24 07:42:25 UTC

Upstream pull request:
https://github.com/squid-cache/squid/pull/788

Upstream commits:
https://github.com/squid-cache/squid/commit/26e65059bc06ebce508737b5cd0866478691566a [master]
https://github.com/squid-cache/squid/commit/2db70e04723cedd19a90dba8b863ccbc2e708f8e [v5]
https://github.com/squid-cache/squid/commit/0003e3518dc95e4b5ab46b5140af79b22253048e [v4]

Comment 6 errata-xmlrpc 2021-11-09 18:05:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4292 https://access.redhat.com/errata/RHSA-2021:4292

Comment 7 Product Security DevOps Team 2021-11-09 18:53:41 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-28652