Bug 710441 - (CVE-2011-2216) CVE-2011-2216 Asterisk: Remote DoS (crash) in SIP channel driver (AST-2011-007)
CVE-2011-2216 Asterisk: Remote DoS (crash) in SIP channel driver (AST-2011-007)
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On: 710443 710444
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Reported: 2011-06-03 08:09 EDT by Jan Lieskovsky
Modified: 2015-07-31 02:41 EDT (History)
3 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2011-07-06 15:44:28 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Jan Lieskovsky 2011-06-03 08:09:14 EDT
A denial of service flaw was found in the way Asterisk processed malformed
Contact headers in SIP calls. A remote attacker could use this flaw to
cause asterisk server crash via specially-crafted Contact header sent in
a reply upon initialization of a SIP call.

[1] http://packetstormsecurity.org/files/view/101966/AST-2011-007.txt
[2] http://seclists.org/fulldisclosure/2011/Jun/39

Upstream patch (against v1.8.x branch):
[3] http://downloads.asterisk.org/pub/security/AST-2011-007-1.8.diff
Comment 1 Jan Lieskovsky 2011-06-03 08:11:02 EDT
This issue affects the version of the asterisk package, as shipped with
Fedora release of 15 and as present within EPEL-6 repository. Please schedule
and update.


This issue did NOT affect the versions of the asterisk package (v1.
based), as shipped with Fedora release of 13 and 14. Confirmation from
Jonathan Rose of Asterisk upstream follows:

This is correct.  Only 1.8 is affected and this is due to a major
overhaul in the sip channel driver to handle URI parsing in a more
generic fashion.  I've tested crash causing exploits against 1.6 and 1.4
and neither were prone to the malformed URI attack."
Comment 2 Jan Lieskovsky 2011-06-03 08:12:43 EDT
Created asterisk tracking bugs for this issue

Affects: fedora-15 [bug 710443]
Affects: epel-6 [bug 710444]

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