Description
The xdr_status_vector function in Firebird before 2.1.7 and 2.5.x before 2.5.3 SU1 allows remote attackers to cause a denial of service (NULL pointer dereference, segmentation fault, and crash) via an op_response action with a non-empty status.
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 7 | firebird2.5 | 2.5.2.26540.ds4-1~deb7u2 | DSA-3109-1 |
| Debian 6.0 | firebird2.1 | 2.1.3.18185-0.ds1-11+squeeze2 | DLA-130-1 |
| Debian 6.0 | firebird2.5 | 2.5.0.26054~ReleaseCandidate3.ds2-1+squeeze2 | DLA-123-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firebird2.5 | 2.5.2.26540.ds4-9ubuntu1.1 | USN-3929-1 |
Advisories 4
- USN-3929-1 firebird2.5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3109-1 firebird2.5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-123-1 firebird2.5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-130-1 firebird2.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-3109 vendor-advisory
- http://www.firebirdsql.org/en/news/security-updates-for-v2-1-and-v2-5-series-66011/
- MDVSA-2015:172 vendor-advisory
- http://tracker.firebirdsql.org/browse/CORE-4630
- openSUSE-SU-2014:1621 vendor-advisory
- http://advisories.mageia.org/MGASA-2014-0523.html
- USN-3929-1 vendor-advisory