Tags: asterisk security, denial of service, Remote Unauthenticated Sessions, security releases, SIP channel driver, Unauthorized data disclosure, Username disclosure, Username disclosure in SIP channel driver
The Asterisk Development Team has announced security releases for Certified Asterisk 1.8.15 and Asterisk 1.8, 10, and 11. The available security releases are released as versions 1.8.15-cert2, 22.214.171.124, 10.12.2, 10.12.2-digiumphones, and 11.2.2.
These releases are available for immediate download at http://downloads.asterisk.org/pub/telephony/asterisk/releases
The release of these versions resolve the following issues:
- A possible buffer overflow during H.264 format negotiation. The format attribute resource for H.264 video performs an unsafe read against a media attribute when parsing the SDP. This vulnerability only affected Asterisk 11. * A denial o f service exists in Asterisk’s HTTP server. AST-2012-014, fixed in January of this year, contained a fix for Asterisk’s HTTP server for a r remotely-triggered crash. While the fix prevented the crash from being triggered, a denial of service vector still exists with that solution if an attacker sends one or more HTTP POST requests with very large Content-Length values.This vulnerability affects Certified Asterisk 1.8.15, Asterisk 1.8, 10, and 11
- A potential username disclosure exists in the SIP channel driver. When authenticating a SIP request with alwaysauthreject enabled, allowguest disabled , and autocreatepeer disabled, Asterisk discloses whether a user exists for INVITE, SUBSCRIBE, and REGISTER transactions in multiple ways.This vulnerability affects Certified Asterisk 1.8.15, Asterisk 1.8, 10, and 11
These issues and their resolutions are described in the security advisories.
For more information about the details of these vulnerabilities, please read security advisories AST-2013-001, AST-2013-002, and AST-2013-003, which were released at the same time as this announcement.
For a full list of changes in the current releases, please see the ChangeLogs:
The security advisories are available at:
Thank you for your continued support of Asterisk!