chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://exchange.xforce.ibmcloud.com/vulnerabilities/68203 | vdb entry |
| http://www.osvdb.org/73307 | vdb entry |
| http://www.securityfocus.com/bid/48431 | vdb entry |
| http://downloads.asterisk.org/pub/security/AST-2011-008.html | vendor advisory |
| http://secunia.com/advisories/45239 | third party advisory |
| http://downloads.asterisk.org/pub/security/AST-2011-008.diff | patch |
| http://www.debian.org/security/2011/dsa-2276 | vendor advisory |
| http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062628.html | vendor advisory |
| http://secunia.com/advisories/45048 | third party advisory vendor advisory |
| http://securitytracker.com/id?1025706 | vdb entry |
| http://secunia.com/advisories/45201 | third party advisory |