Vulnerability CVE-2013-5642
Published: 2013-09-09

Description:
The SIP channel driver (channels/chan_sip.c) in Asterisk Open Source 1.8.x before 1.8.23.1, 10.x before 10.12.3, and 11.x before 11.5.1; Certified Asterisk 1.8.15 before 1.8.15-cert3 and 11.2 before 11.2-cert2; and Asterisk Digiumphones 10.x-digiumphones before 10.12.3-digiumphones allows remote attackers to cause a denial of service (NULL pointer dereference, segmentation fault, and daemon crash) via an invalid SDP that defines a media description before the connection description in a SIP request.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Digium -> Asterisk 
Digium -> Asterisk digiumphones 
Digium -> Certified asterisk 

 References:
http://downloads.asterisk.org/pub/security/AST-2013-005.html
https://issues.asterisk.org/jira/browse/ASTERISK-22007
http://www.securitytracker.com/id/1028957
http://www.securityfocus.com/bid/62022
http://www.mandriva.com/security/advisories?name=MDVSA-2013:223
http://www.debian.org/security/2013/dsa-2749
http://secunia.com/advisories/54617
http://secunia.com/advisories/54534
http://osvdb.org/96690
http://archives.neohapsis.com/archives/bugtraq/2013-08/0174.html
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