tcptls.c in the TCP/TLS server in Asterisk Open Source 1.6.1.x before 1.6.1.23, 1.6.2.x before 1.6.2.17.1, and 1.8.x before 1.8.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) by establishing many short TCP sessions to services that use a certain TLS API.

References

• https://nvd.nist.gov/vuln/detail/CVE-2011-1175
• https://bugzilla.redhat.com/show_bug.cgi?id=688678
• https://exchange.xforce.ibmcloud.com/vulnerabilities/66140
• http://downloads.asterisk.org/pub/security/AST-2011-004.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056945.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-March/057156.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-March/057163.html
• http://openwall.com/lists/oss-security/2011/03/17/5
• http://openwall.com/lists/oss-security/2011/03/21/12
• http://securitytracker.com/id?1025224
• http://www.debian.org/security/2011/dsa-2225
• http://www.securityfocus.com/bid/46898
• http://www.vupen.com/english/advisories/2011/0686
• http://www.vupen.com/english/advisories/2011/0790