CVE-2009-2620: Firebirdsql Firebird

Medium severity, CVSS 5.0. EPSS: 8.6% chance of exploitation in the next 30 days.

src/remote/server.cpp in fbserver.exe in Firebird SQL 1.5 before 1.5.6, 2.0 before 2.0.6, 2.1 before 2.1.3, and 2.5 before 2.5 Beta 2 allows remote attackers to cause a denial of service (daemon crash) via a malformed op_connect_request message that triggers an infinite loop or NULL pointer dereference.

Affected products

• Firebirdsql Firebird: from 1.5, before 1.5.6 (fixed in 1.5.6); from 2.0.0, before 2.0.6 (fixed in 2.0.6); from 2.1, before 2.1.3 (fixed in 2.1.3); version 2.5.0 only

Published 2009-07-29. Last modified 2026-06-16.