Description
Double free vulnerability in apps/app_voicemail.c in Asterisk Open Source 1.8.x before 1.8.13.1 and 10.x before 10.5.2, Certified Asterisk 1.8.11-certx before 1.8.11-cert4, and Asterisk Digiumphones 10.x.x-digiumphones before 10.5.2-digiumphones allows remote authenticated users to cause a denial of service (daemon crash) by establishing multiple voicemail sessions and accessing both the Urgent mailbox and the INBOX mailbox.
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 | 1:1.8.13.1~dfsg-1 | — |
| Debian 6.0 | asterisk | 1:1.6.2.9-2+squeeze7 | DSA-2550-1 |
Advisories 1
- DSA-2550-1 asterisk - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- 50687 third-party-advisory
- 50756 third-party-advisory
- 54317 vdb-entry
- DSA-2550 vendor-advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-20052
- http://downloads.asterisk.org/pub/security/AST-2012-011.html