Bug 1312257 (CVE-2016-2569, CVE-2016-2570)

Summary:	CVE-2016-2569 CVE-2016-2570 squid: some code paths fail to check bounds in string object
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	cbuissar, henrik, jonathansteffan, knoha, luhliari, psimerda, security-response-team, thozza, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	squid 4.0.7, squid 3.5.15	Doc Type:	Bug Fix
Doc Text:	Incorrect boundary checks were found in the way squid handled headers in HTTP responses, which could lead to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially crafted HTTP response.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-11-04 09:01:30 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:	1312267, 1322770
Bug Blocks:	1311588, 1312266

Description Andrej Nemec 2016-02-26 09:10:09 UTC

The proxy contains a String object class with 64KB content limits.
Some code paths do not bounds check before appending to these String
and overflow leads to an assertion which terminates all client
transactions using the proxy, including those unrelated to the limit
being exceeded.

Upstream patches:

http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13991.patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-14552.patch

External references:

http://www.squid-cache.org/Advisories/SQUID-2016_2.txt

CVE assignment:

http://seclists.org/oss-sec/2016/q1/442

Comment 1 Andrej Nemec 2016-02-26 09:15:35 UTC

Added CVE 2016-2570, as it relates to other patches for the same issue.

Upstream comment about this:

This patch fixes the other related variant of the basic problem.
Though this instance is not triggerable from outside a controlled CDN
environment

Upstream patches for this CVE:

http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13993.patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-14549.patch

Comment 2 Adam Mariš 2016-03-02 15:09:38 UTC

*** Bug 1311584 has been marked as a duplicate of this bug. ***

Comment 11 errata-xmlrpc 2016-11-03 21:16:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2600 https://rhn.redhat.com/errata/RHSA-2016-2600.html

Comment 13 Andrej Nemec 2017-09-08 11:53:49 UTC

Statement:

Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. 

For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.