The Asterisk Development Team has announced security releases for Certified Asterisk 1.8.28 and 11.6 and Asterisk 1.8, 11, 12, and 13. The available security releases are released as versions 1.8.28.cert-4, 18.104.22.168, 11.6-cert10, 11.15.1, 12.8.1, and 13.1.1. These releases are available for immediate download at http://downloads.asterisk.org/pub/telephony/asterisk/releases
The release of these versions resolves the following security vulnerabilities:
- AST-2015-001: File descriptor leak when incompatible codecs are offered
Asterisk may be configured to only allow specific audio or video codecs to be used when communicating with a particular endpoint. When an endpoint sends an SDP offer that only lists codecs not allowed by Asterisk, the offer is rejected. However, in this case, RTP ports that are allocated in the process are not reclaimed. This issue only affects the PJSIP channel driver in Asterisk. Users of the chan_sip channel driver are not affected.
- AST-2015-002: Mitigation for libcURL HTTP request injection vulnerability
CVE-2014-8150 reported an HTTP request injection vulnerability in libcURL. Asterisk uses libcURL in its func_curl.so module (the CURL() dialplan function), as well as its res_config_curl.so (cURL realtime backend) modules. Since Asterisk may be configured to allow for user-supplied URLs to be passed to libcURL, it is possible that an attacker could use Asterisk as an attack vector to inject unauthorized HTTP requests if the version of libcURL installed on the Asterisk server is affected by CVE-2014-8150.
For more information about the details of these vulnerabilities, please read security advisory AST-2015-001 and AST-2015-002, 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!