Description
Asterisk Open Source 1.6.0.x before 1.6.0.22, 1.6.1.x before 1.6.1.14, and 1.6.2.x before 1.6.2.2, and Business Edition C.3 before C.3.3.2, allows remote attackers to cause a denial of service (daemon crash) via an SIP T.38 negotiation with an SDP FaxMaxDatagram field that is (1) missing, (2) modified to contain a negative number, or (3) modified to contain a large number.
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 | 1:1.6.2.2-1 | — |
References
- http://downloads.asterisk.org/pub/security/AST-2010-001-1.6.1.diff
- https://issues.asterisk.org/view.php?id=16517
- https://issues.asterisk.org/view.php?id=16634
- ADV-2010-0289 vdb-entry
- 38047 vdb-entry
- 39096 third-party-advisory
- FEDORA-2010-3724 vendor-advisory
- https://issues.asterisk.org/view.php?id=16724
- http://downloads.asterisk.org/pub/security/AST-2010-001-1.6.2.diff
- 20100202 AST-2010-001: T.38 Remote Crash Vulnerability mailing-list
- http://downloads.asterisk.org/pub/security/AST-2010-001-1.6.0.diff
- 38395 third-party-advisory
- 1023532 vdb-entry
- http://downloads.asterisk.org/pub/security/AST-2010-001.html