Product

Asterisk

Summary

Remote crash vulnerability when receiving UDPTL FAX data.

Nature of Advisory

Denial of Service

Susceptibility

Remote Authenticated Sessions

Severity

Minor

Exploits Known

Yes

Reported On

December 2, 2015

Reported By

Walter Dokes, Torrey Searle

Posted On

February 3, 2016

Last Updated On

February 15, 2016

Advisory Contact

Richard Mudgett <rmudgett AT digium DOT com>

CVE Name

CVE-2016-2232

Description

If no UDPTL packets are lost there is no problem. However, a lost packet causes Asterisk to use the available error correcting redundancy packets. If those redundancy packets have zero length then Asterisk uses an uninitialized buffer pointer and length value which can cause invalid memory accesses later when the packet is copied.

Resolution

Upgrade to a released version with the fix incorporated or apply patch.

Affected Versions

Product

Release Series

Asterisk Open Source

1.8.x

All versions

Asterisk Open Source

11.x

All versions

Asterisk Open Source

12.x

All versions

Asterisk Open Source

13.x

All versions

Certified Asterisk

1.8.28

All versions

Certified Asterisk

11.6

All versions

Certified Asterisk

13.1

All versions

Corrected In

Product

Release

Asterisk Open Source

11.21.1, 13.7.1

Certified Asterisk

11.6-cert12, 13.1-cert3

Patches

SVN URL

Revision

http://downloads.asterisk.org/pub/security/AST-2016-003-1.8.28.diff

Certified Asterisk 1.8.28

http://downloads.asterisk.org/pub/security/AST-2016-003-11.6.diff

Certified Asterisk 11.6

http://downloads.asterisk.org/pub/security/AST-2016-003-13.1.diff

Certified Asterisk 13.1

http://downloads.asterisk.org/pub/security/AST-2016-003-1.8.diff

Asterisk 1.8

http://downloads.asterisk.org/pub/security/AST-2016-003-11.diff

Asterisk 11

http://downloads.asterisk.org/pub/security/AST-2016-003-12.diff

Asterisk 12

http://downloads.asterisk.org/pub/security/AST-2016-003-13.diff

Asterisk 13

Links

https://issues.asterisk.org/jira/browse/ASTERISK-25603

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This document may be superseded by later versions; if so, the latest version will be posted at http://downloads.digium.com/pub/security/AST-2016-003.pdf and http://downloads.digium.com/pub/security/AST-2016-003.html

Revision History

Date

Editor

Revisions Made

December 7, 2015

Richard Mudgett

Initial document created

February 15, 2016

Kevin Harwell

CVE assignment