Description
TraceManager in Firebird 2.5.0 and 2.5.1, when trace is enabled, allows remote authenticated users to cause a denial of service (NULL pointer dereference and crash) by preparing an empty dynamic SQL query.
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 6.0 | firebird2.5 | 2.5.0.26054~ReleaseCandidate3.ds2-1+squeeze1 | DSA-2648-1 |
Advisories 1
- DSA-2648-1 firebird2.5 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- 1027769 vdb-entry
- firebird-tracedsqlprepareprepare-dos(80073) vdb-entry
- 56521 vdb-entry
- [oss-security] 20121114 CVE Request -- firebird: DoS (NULL pointer dereference) while preparing an empty query with trace enabled mailing-list
- http://tracker.firebirdsql.org/browse/CORE-3884
- DSA-2648 vendor-advisory
- [oss-security] 20121114 Re: CVE Request -- firebird: DoS (NULL pointer dereference) while preparing an empty query with trace enabled mailing-list