Bug 1334246 (CVE-2016-4555)

Summary:	CVE-2016-4555 squid: SegFault from ESIInclude::Start
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 3.5.18	Doc Type:	Bug Fix
Doc Text:	A NULL pointer dereference flaw was found in the way Squid processes ESI responses. If Squid was used as a reverse proxy or for TLS/HTTPS interception, a malicious server could use this flaw to crash the Squid worker process.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-06-09 12:43:38 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:	1334251, 1334491, 1334492, 1334499, 1334500
Bug Blocks:	1334247

Description Andrej Nemec 2016-05-09 09:15:10 UTC

Due to incorrect pointer handling Squid is vulnerable to a denial of service attack when processing ESI responses.

External references:

http://www.squid-cache.org/Advisories/SQUID-2016_9.txt

Upstream fixes:

Squid 3.5:

http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patch

Squid 3.4:

http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patch

NOTE:
For For the other related CVE, CVE-2016-4556, see Bug 1334786

Comment 1 Andrej Nemec 2016-05-09 09:20:48 UTC

Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1334251]

Comment 9 errata-xmlrpc 2016-05-31 05:43:24 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:1139 https://access.redhat.com/errata/RHSA-2016:1139

Comment 10 errata-xmlrpc 2016-05-31 05:57:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:1140 https://access.redhat.com/errata/RHSA-2016:1140

Comment 11 Fedora Update System 2016-07-12 20:27:36 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 12 Fedora Update System 2016-07-12 23:52:18 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.