reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.2 does not initialize certain strings, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a malformed Contact header.
http://downloads.digium.com/pub/security/AST-2011-007.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062658.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062013.html
http://secunia.com/advisories/44828
http://securitytracker.com/id?1025598
http://www.securityfocus.com/archive/1/518236/100/0/threaded
Source: MITRE
Published: 2011-06-06
Updated: 2018-10-09
Type: NVD-CWE-Other
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM