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
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-3947
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1323591
Blocks: 1323611
TreeView+ depends on / blocked
 
Reported: 2016-04-04 07:43 UTC by Andrej Nemec
Modified: 2019-09-29 13:46 UTC (History)
6 users (show)

Fixed In Version: squid 3.5.16
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-04-05 13:22:57 UTC


Attachments (Terms of Use)

Description Andrej Nemec 2016-04-04 07:43:01 UTC
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 07:43:34 UTC
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1323591]

Comment 2 Cedric Buissart 2016-04-05 13:18:48 UTC
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 20:28:14 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 23:52:56 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.


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