Vulnerability Monitor

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CVE-2009-2620

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.

Security Impact Summary

CVE-2009-2620 is a security vulnerability that . Impacting 1 product from firebirdsql organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2009, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2009-07-29T17:30:01.280

Last Modified

2025-10-10T10:26:26.423

Status

Analyzed

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	firebirdsql	firebird	< 1.5.6	Yes
Application	firebirdsql	firebird	< 2.0.6	Yes
Application	firebirdsql	firebird	< 2.1.3	Yes
Application	firebirdsql	firebird	2.5.0	Yes
Application	firebirdsql	firebird	2.5.0	Yes
Application	firebirdsql	firebird	2.5.0	Yes

References

http://tracker.firebirdsql.org/browse/CORE-2563 Vendor Advisory ([email protected])
http://www.coresecurity.com/content/firebird-sql-dos Exploit ([email protected])
http://www.exploit-db.com/exploits/9295 Exploit ([email protected])
http://www.securityfocus.com/bid/35842 Exploit, Patch ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=514463 Issue Tracking ([email protected])
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01341.html Broken Link ([email protected])
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01370.html Broken Link ([email protected])
http://tracker.firebirdsql.org/browse/CORE-2563 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.coresecurity.com/content/firebird-sql-dos Exploit (af854a3a-2127-422b-91ae-364da2661108)
http://www.exploit-db.com/exploits/9295 Exploit (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/35842 Exploit, Patch (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=514463 Issue Tracking (af854a3a-2127-422b-91ae-364da2661108)
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01341.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01370.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For firebirdsql's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.