Bug 1323594 (CVE-2016-3948)

Summary:	CVE-2016-3948 squid: denial of service issue in HTTP response processing
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, luhliari, psimerda, thozza
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	squid 3.5.16	Doc Type:	Bug Fix
Doc Text:	An incorrect boundary check was found in the way squid handled the Vary header 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 09:03:46 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:	1322770, 1323591
Bug Blocks:	1323611

Description Andrej Nemec 2016-04-04 07:50:34 UTC

Due to incorrect bounds checking Squid is vulnerable to a denial of service attack when processing HTTP responses.

External references:

http://www.squid-cache.org/Advisories/SQUID-2016_4.txt

Upstream fix:

http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14016.patch

References:

http://seclists.org/oss-sec/2016/q2/3

Comment 2 Cedric Buissart 2016-04-07 09:21:20 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/.

Comment 4 Fedora Update System 2016-07-12 20:28:09 UTC

squid-3.5.19-2.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2016-07-12 23:52:51 UTC

squid-3.5.10-4.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 errata-xmlrpc 2016-11-03 21:17:19 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