HOMEVULNERABILITIESCVE-2009-2620
MEDIUMPOC

CVE-2009-2620

CWE-20Published: July 29, 2009· Updated: Jun 16, 2026

5.0
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2009-2620 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2009-2620. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected Vendors & Products

firebirdsql1 product(s)
firebird
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.securityfocus.com/bid/35842
PATCHhttp://www.securityfocus.com/bid/35842
ADVISORYhttp://tracker.firebirdsql.org/browse/CORE-2563
ADVISORYhttp://tracker.firebirdsql.org/browse/CORE-2563

All References (14)

→
http://tracker.firebirdsql.org/browse/CORE-2563Vendor Advisory
→
http://www.coresecurity.com/content/firebird-sql-dosExploit
→
http://www.exploit-db.com/exploits/9295Exploit
→
http://www.securityfocus.com/bid/35842Exploit · Patch
→
https://bugzilla.redhat.com/show_bug.cgi?id=514463Issue Tracking
→
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01341.htmlBroken Link
→
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01370.htmlBroken Link
→
http://tracker.firebirdsql.org/browse/CORE-2563Vendor Advisory
→
http://www.coresecurity.com/content/firebird-sql-dosExploit
→
http://www.exploit-db.com/exploits/9295Exploit
→
http://www.securityfocus.com/bid/35842Exploit · Patch
→
https://bugzilla.redhat.com/show_bug.cgi?id=514463Issue Tracking
→
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01341.htmlBroken Link
→
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01370.htmlBroken Link

Quick Facts

CVE IDCVE-2009-2620
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-20
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedJul 29, 2009

Related CVEs (CWE-20)

CVE-2026-48316
10.0
CVE-2003-1487
10.0
CVE-2026-48281
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CVE-2026-33587
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CVE-2026-47928
10.0
CVE-2007-1097
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2009-2620 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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