PJSIP, as used in Asterisk Open Source 13.x before 13.15.1 and 14.x before 14.4.1, Certified Asterisk 13.13 before 13.13-cert4, and other products, allows remote attackers to cause a denial of service (buffer overflow and application crash) via a SIP packet with a crafted CSeq header in conjunction with a Via header that lacks a branch parameter.
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://bugs.debian.org/863901 | third party advisory mailing list |
| http://downloads.asterisk.org/pub/security/AST-2017-002.txt | third party advisory |
| http://www.securityfocus.com/bid/98572 | vdb entry third party advisory |
| http://www.debian.org/security/2017/dsa-3933 | vendor advisory |
| http://www.securitytracker.com/id/1038529 | vdb entry |