Description
Insufficient checks in the UDF subsystem in Firebird 2.5.x before 2.5.7 and 3.0.x before 3.0.2 allow remote authenticated users to execute code by using a 'system' entrypoint from fbudf.so.
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 | firebird3.0 | 3.0.1.32609.ds4-14 | — |
| Debian 13 | firebird3.0 | 3.0.1.32609.ds4-14 | — |
| Debian 12 | firebird3.0 | 3.0.1.32609.ds4-14 | — |
| Debian 8 | firebird2.5 | 2.5.3.26778.ds4-5+deb8u1 | DSA-3824-1 |
| Debian 7 | firebird2.5 | 2.5.2.26540.ds4-1~deb7u3 | DLA-879-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firebird2.5 | 2.5.2.26540.ds4-9ubuntu1.1 | USN-3929-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | firebird2.5 | 2.5.4.26856.ds4-1ubuntu0.1~esm1 | USN-4822-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | firebird-classic | 2.5.2.26539-15.1 | SUSE-SU-2017:1156-1 |
| SLES 12 SP1 | firebird +1 | 2.5.2.26539-15.1 | SUSE-SU-2017:1156-1 |
Advisories 5
- USN-4822-1 firebird2.5 vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-3929-1 firebird2.5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-879-1 firebird2.5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3824-1 firebird2.5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:1156-1 Security update for firebird SUSE / openSUSE Security Updates · Feb 4, 2026
References
- DSA-3824 vendor-advisory
- http://tracker.firebirdsql.org/browse/CORE-5474
- 97070 vdb-entry
- USN-3929-1 vendor-advisory