Description
c2faxrecv in capi4hylafax 01.02.03 allows remote attackers to execute arbitrary commands via null (\0) and shell metacharacters in the TSI string, as demonstrated by a fax from an anonymous number.
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 3.1 | capi4hylafax | 1:01.02.03-10sarge2 | DSA-1165 |
Advisories 1
- DSA-1165 capi4hylafax - missing input sanitising Debian Security (DSA / DLA) · Mar 9, 2026
References
- 19801 vdb-entry
- 21726 third-party-advisory
- SUSE-SR:2007:004 vendor-advisory
- 22450 third-party-advisory
- ADV-2006-3430 vdb-entry
- 21722 third-party-advisory
- GLSA-200610-05 vendor-advisory
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=382474
- DSA-1165 vendor-advisory