Product

Asterisk

Summary

BEAST vulnerability in HTTP server

Nature of Advisory

Unauthorized data disclosure due to man-in-the-middle attack

Susceptibility

Remote unauthenticated sessions

Severity

Minor

Exploits Known

Yes

Reported On

04/15/15

Reported By

Alex A. Welzl

Posted On

02/03/16

Last Updated On

February 15, 2016

Advisory Contact

Joshua Colp <jcolp AT digium DOT com>

CVE Name

CVE-2011-3389

Description

The Asterisk HTTP server currently has a default configuration which allows the BEAST vulnerability to be exploited if the TLS functionality is enabled. This can allow a man-in-the-middle attack to decrypt data passing through it.

Resolution

Additional configuration options have been added to Asterisk which allow configuration of the HTTP server to not be susceptible to the BEAST vulnerability. These include options to confirm the permitted ciphers, to control what TLS protocols are allowed, and to use server cipher preference order instead of client preference order. The default configuration has also been changed for the HTTP server to use a configuration which is not susceptible to the BEAST vulnerability.

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-2016-001-1.8.28.diff

Certified Asterisk 1.8.28

http://downloads.asterisk.org/pub/security/AST-2016-001-11.6.diff

Certified Asterisk 11.6

http://downloads.asterisk.org/pub/security/AST-2016-001-13.1.diff

Certified Asterisk 13.1

http://downloads.asterisk.org/pub/security/AST-2016-001-11.diff

Asterisk 11

http://downloads.asterisk.org/pub/security/AST-2016-001-12.diff

Asterisk 12

http://downloads.asterisk.org/pub/security/AST-2016-001-13.diff

Asterisk 13

Links

https://issues.asterisk.org/jira/browse/ASTERISK-24972

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This document may be superseded by later versions; if so, the latest version will be posted at http://downloads.digium.com/pub/security/AST-2016-001.pdf and http://downloads.digium.com/pub/security/AST-2016-001.html

Revision History

Date

Editor

Revisions Made

3 August, 2015

Joshua Colp

Initial creation of document

15 February 2016

Kevin Harwell

CVE assignment