Description
chan_iax2.c in the IAX2 channel driver in Asterisk Open Source 1.4.x before 1.4.41.1, 1.6.2.x before 1.6.2.18.1, and 1.8.x before 1.8.4.3, and Asterisk Business Edition C.3 before C.3.7.3, accesses a memory address contained in an option control frame, which allows remote attackers to cause a denial of service (daemon crash) or possibly have unspecified other impact via a crafted frame.
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 | — |
| Debian 6.0 | asterisk | 1:1.6.2.9-2+squeeze3 | DSA-2276-2, DSA-2276-1 |
| Debian 5.0 | asterisk | 1:1.4.21.2~dfsg-3+lenny3 | DSA-2276-2, DSA-2276-1 |
Advisories 2
- DSA-2276-2 asterisk - multiple issues Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2276-1 asterisk - multiple issues Debian Security (DSA / DLA) · Mar 9, 2026
References
- 44973 third-party-advisory
- http://downloads.asterisk.org/pub/security/AST-2011-010-1.8.diff
- asterisk-iax2channeldriver-dos(68205) vdb-entry
- http://downloads.asterisk.org/pub/security/AST-2011-010.html
- 48431 vdb-entry
- 1025708 vdb-entry
- 45239 third-party-advisory
- DSA-2276 vendor-advisory
- FEDORA-2011-8914 vendor-advisory
- 45048 third-party-advisory
- 73309 vdb-entry
- 45201 third-party-advisory