Bug 1770371 (CVE-2019-12523)

Summary:	CVE-2019-12523 squid: Improper input validation in URI processor
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
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, jonathansteffan, luhliari, uwe.knop, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	squid 4.9	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:23:06 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:	1770372, 1771274, 1771275
Bug Blocks:	1770374

Description Pedro Sampaio 2019-11-08 20:02:30 UTC

Due to improper input validation Squid is vulnerable to security bypass attacks. Attacker can gain access to restricted HTTP servers.

References:

http://www.squid-cache.org/Advisories/SQUID-2019_8.txt

Comment 1 Pedro Sampaio 2019-11-08 20:02:43 UTC

Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1770372]

Comment 2 Huzaifa S. Sidhpurwala 2019-11-12 05:33:47 UTC

Upstream patch: http://www.squid-cache.org/Versions/v4/changesets/squid-4-fbbdf75efd7a5cc244b4886a9d42ea458c5a3a73.patch

Comment 3 Huzaifa S. Sidhpurwala 2019-11-12 05:33:51 UTC

External References:

http://www.squid-cache.org/Advisories/SQUID-2019_8.txt

Comment 7 Huzaifa S. Sidhpurwala 2020-07-07 03:25:43 UTC

Mitigation:

Access to manager services can be prevented by enabling the Via header: (in /etc/squid/squid.conf)
~~~ 
via on
~~~
There are no reliable workarounds to prevent access to restricted upstream servers.

Comment 8 Product Security DevOps Team 2020-11-04 02:23:06 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-2019-12523

Comment 9 errata-xmlrpc 2020-11-04 03:31:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4743 https://access.redhat.com/errata/RHSA-2020:4743