Bug 1323590 – CVE-2016-3947 squid: buffer overrun in Squid proxy pinger

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Bug 1323590 - (CVE-2016-3947) CVE-2016-3947 squid: buffer overrun in Squid proxy pinger

Summary:	CVE-2016-3947 squid: buffer overrun in Squid proxy pinger

Status:	CLOSED NOTABUG

Aliases:	CVE-2016-3947

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	high Severity high
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=important,public=20160401,repo...
Keywords:	Security

Depends On:	1323591
Blocks:	1323611
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Reported:	2016-04-04 03:43 EDT by Andrej Nemec
Modified:	2016-07-12 19:52 EDT (History)
CC List:	6 users (show)

See Also:
Fixed In Version:	squid 3.5.16
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-04-05 09:22:57 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Andrej Nemec 2016-04-04 03:43:01 EDT

A buffer overrun (on write(2)) has been found in Squid proxy 'pinger'
process that allows an attacker to craft ICMPv6 messages that will
either crash the child process (if the OS protects against over-write)
or alter heap contents allowing the attacker to bypass CVE-2014-7142
protection and leak arbitrary heap data into the Squid log files. The
pinger is setuid root (though it does drop those privileges prior to
this attack being possible).

Upstream fix:

http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14015.patch

External references:

http://www.squid-cache.org/Advisories/SQUID-2016_3.txt

References:

http://seclists.org/oss-sec/2016/q2/2

Comment 1 Andrej Nemec 2016-04-04 03:43:34 EDT

Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1323591]

Comment 2 Cedric Buissart 2016-04-05 09:18:48 EDT

Statement:

This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux 5, 6 and 7 as they did not include support for ICMP pinging and the 'pinger' binary.

Comment 4 Fedora Update System 2016-07-12 16:28:14 EDT

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 19:52:56 EDT

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.

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