Description
channels/chan_sip.c in Asterisk Open Source 1.8.x before 1.8.26.1, 11.8.x before 11.8.1, and 12.1.x before 12.1.1, and Certified Asterisk 1.8.15 before 1.8.15-cert5 and 11.6 before 11.6-cert2, when chan_sip has a certain configuration, allows remote authenticated users to cause a denial of service (channel and file descriptor consumption) via an INVITE request with a (1) Session-Expires or (2) Min-SE header with a malformed or invalid value.
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 | 1:11.8.1~dfsg-1 | — |
| Debian 7 | asterisk | 1:1.8.13.1~dfsg1-3+deb7u5 | DLA-781-1 |
Advisories 1
- DLA-781-1 asterisk - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- 66094 vdb-entry
- http://downloads.asterisk.org/pub/security/AST-2014-002.html
- https://issues.asterisk.org/jira/browse/ASTERISK-23373
- MDVSA-2014:078 vendor-advisory
- FEDORA-2014-3762 vendor-advisory
- FEDORA-2014-3779 vendor-advisory
- http://downloads.asterisk.org/pub/security/AST-2014-002-1.8.diff