Description
The IAX2 channel driver (chan_iax2) in Asterisk before 20070504 does not properly null terminate data, which allows remote attackers to trigger loss of transmitted data, and possibly obtain sensitive information (memory contents) or cause a denial of service (application crash), by sending a frame that lacks a 0 byte.
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 | 1:1.4.5~dfsg-1 | — |
| Debian 4.0 | asterisk | 1:1.2.13~dfsg-2etch1 | DSA-1358-1 |
| Debian 3.1 | asterisk | 1:1.0.7.dfsg.1-2sarge5 | DSA-1358-1 |
Advisories 1
- DSA-1358-1 asterisk Debian Security (DSA / DLA) · Mar 9, 2026
References
- ADV-2007-1661 vdb-entry
- SUSE-SA:2007:034 vendor-advisory
- 35769 vdb-entry
- asterisk-iax2-information-disclosure(34085) vdb-entry
- 25582 third-party-advisory
- 25134 third-party-advisory
- http://ftp.digium.com/pub/asa/ASA-2007-013.pdf
- 23824 vdb-entry
- DSA-1358 vendor-advisory