Description
reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.3 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a SIP packet with a Contact header that lacks a < (less than) character.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | asterisk | 1:1.8.4.3-1 | — |
References
- http://downloads.asterisk.org/pub/security/AST-2011-009.html
- 45239 third-party-advisory
- DSA-2276 vendor-advisory
- FEDORA-2011-8914 vendor-advisory
- http://downloads.asterisk.org/pub/security/AST-2011-009-1.8.diff
- 45048 third-party-advisory
- 45201 third-party-advisory