AST-2011-003:

Product Asterisk
Summary Resource exhaustion in Asterisk Manager Interface
Nature of Advisory Denial of Service
Susceptibility Remote Unauthenticated Sessions if manager interface is
accessible
Severity Moderate
Exploits Known No
Reported On March 1, 2011
Reported By Blake Cornell <[email protected]>
Posted On March 16, 2011
Last Updated On March 14, 2011
Advisory Contact Terry Wilson <[email protected]>

           Rapidly opening manager connections, sending invalid data, and 

Description closing the connection can cause Asterisk to exhaust available
CPU and memory resources. The manager interface is disabled by
default.

Resolution Failed writes to manager clients are flagged and the connection
closed.

Affected Versions
Product Release Series
Asterisk Open Source 1.6.1.x All versions
Asterisk Open Source 1.6.2.x All versions
Asterisk Open Source 1.8.x All versions

Corrected In
Product Release
Asterisk Open Source 1.6.1.23, 1.6.2.17.1, 1.8.3.1

Patches
URL Branch
http://downloads.asterisk.org/pub/security/AST-2011-003-1.6.1.diff 1.6.1
http://downloads.asterisk.org/pub/security/AST-2011-003-1.6.2.diff 1.6.2
http://downloads.asterisk.org/pub/security/AST-2011-003-1.8.diff 1.8

Links

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2011-003.pdf and
http://downloads.digium.com/pub/security/AST-2011-003.html

Revision History
Date Editor Revisions Made
2011-03-14 Terry Wilson Initial release