Description
chan_iax2.c in the IAX2 channel driver in Certified Asterisk 1.8.11-cert before 1.8.11-cert2 and Asterisk Open Source 1.8.x before 1.8.12.1 and 10.x before 10.4.1, when a certain mohinterpret setting is enabled, allows remote attackers to cause a denial of service (daemon crash) by placing a call on hold.
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 | 1:1.8.13.0~dfsg-1 | — |
| Debian 6.0 | asterisk | 1:1.6.2.9-2+squeeze6 | DSA-2493-1 |
Advisories 1
- DSA-2493-1 asterisk - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-2493 vendor-advisory
- 1027102 vdb-entry
- 20120529 AST-2012-007: Remote crash vulnerability in IAX2 channel driver. mailing-list
- http://downloads.asterisk.org/pub/security/AST-2012-007.html
- 49303 third-party-advisory