CVE-2011-1175: Null Pointer Dereference
AST-2011-004 [1] describes a remote crash vulnerability in the Asterisk TCP/TLS server. If a remote, unauthenticated, attacker were to rapidly open and close TCP connections to services using the asttcptls API, they could cause Asterisk to crash after dereferencing a NULL pointer. This flaw affects 1.6.2.x and 1.8.x, and is corrected in 1.6.2.17.1 and 1.8.3.1.
[1] http://downloads.asterisk.org/pub/security/AST-2011-004.pdf
Other sources
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.
— MITRE
Affected Software
Remediation
Patch Available
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2011-1175?
CVE-2011-1175 is classified as a high severity vulnerability due to its potential to cause a denial of service by crashing the Asterisk server.
How do I fix CVE-2011-1175?
To fix CVE-2011-1175, upgrade your Asterisk installation to the latest version that addresses this vulnerability.
Which versions of Asterisk are affected by CVE-2011-1175?
CVE-2011-1175 affects multiple versions of Asterisk, including versions 1.6.1.0-beta2 to 1.6.1.22.
What type of vulnerability is CVE-2011-1175?
CVE-2011-1175 is a remote crash vulnerability caused by rapid opening and closing of TCP connections.
Can CVE-2011-1175 be exploited remotely?
Yes, CVE-2011-1175 can be exploited remotely by an unauthenticated attacker.