CVE-2009-2620

Exp

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.

Published: 2009-07-29 Last update: 2025-10-10 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-2620 is rated High Exploit Risk (66.8/100): CVSS Medium severity, with high exploitation likelihood (EPSS 10.03%, 93th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-2620

EDB-ID Source Kind Published Link
9295 exploit_db edb 2009-07-28 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-2620

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-10-10 10.68% 10.03% -0.65%
2 2025-03-30 24.00% 10.68% -13.32%
3 2025-03-29 — 24.00% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-2620

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2009-2620

OS Trackers for CVE-2009-2620

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2009-2620
ubuntu medium CVE-2009-2620 medium priority: Ubuntu including 2 source packages (firebird2.0, firebird2.1), 20 status rows across 10 suites (dapper, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): ignored 7, DNE 6, not-affected 5, needs-triage 2. https://ubuntu.com/security/CVE-2009-2620

Affected software / configurations for CVE-2009-2620

Vendor Product Version Raw CPE
firebirdsql firebird >= 1.5, < 1.5.6 cpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
firebirdsql firebird >= 2.0.0, < 2.0.6 cpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
firebirdsql firebird >= 2.1, < 2.1.3 cpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
firebirdsql firebird 2.5.0 cpe:2.3:a:firebirdsql:firebird:2.5.0:-:*:*:*:*:*:*
firebirdsql firebird 2.5.0 cpe:2.3:a:firebirdsql:firebird:2.5.0:alpha1:*:*:*:*:*:*
firebirdsql firebird 2.5.0 cpe:2.3:a:firebirdsql:firebird:2.5.0:beta1:*:*:*:*:*:*

References for CVE-2009-2620

cvelogic Threat Intelligence