CVE-2009-2620

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-07-29 · updated 2026-06-16
Weakness: CWE-20

Description

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; from 2.0.0 before 2.0.6; from 2.1 before 2.1.3; 2.5.0, 2.5.0-alpha1, 2.5.0-beta1 — fixed in 1.5.6, 2.0.6, 2.1.3

How to fix

Upgrade to a fixed version: FirebirdSQL firebird 1.5.6, 2.0.6, 2.1.3. Check the vendor advisory for mitigations.

References

http://tracker.firebirdsql.org/browse/CORE-2563
http://www.coresecurity.com/content/firebird-sql-dos
http://www.exploit-db.com/exploits/9295
http://www.securityfocus.com/bid/35842
https://bugzilla.redhat.com/show_bug.cgi?id=514463
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01341.html
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01370.html
http://tracker.firebirdsql.org/browse/CORE-2563
http://www.coresecurity.com/content/firebird-sql-dos
http://www.exploit-db.com/exploits/9295
http://www.securityfocus.com/bid/35842
https://bugzilla.redhat.com/show_bug.cgi?id=514463

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