Firebird SQL Server up to 2.5 input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in Firebird SQL Server and classified as problematic. The impacted element is an unknown function. The manipulation leads to input validation. This vulnerability is traded as CVE-2009-2620. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Firebird SQL Server (Database Software) and classified as problematic. This issue affects an unknown part. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

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.

The bug was discovered 07/28/2009. The weakness was shared 07/29/2009 by Francisco Falcon with CORE Security Technologies (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2009-2620 since 07/28/2009. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed in Python. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 40830 (Fedora 11 : firebird-2.1.3.18185.0-2.fc11 (2009-8340)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 116595 (Fedora Update for firebird (FEDORA-2009-8317,FEDORA-2009-8340)).

Upgrading to version 1.5.4.4910 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 8679.

The vulnerability is also documented in the databases at X-Force (52121), Exploit-DB (9295), Tenable (40830), SecurityFocus (BID 35842†) and OSVDB (56606†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 40830
Nessus Name: Fedora 11 : firebird-2.1.3.18185.0-2.fc11 (2009-8340)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 64739
OpenVAS Name: Fedora Core 10 FEDORA-2009-8317 (firebird)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: SQL Server 1.5.4.4910
TippingPoint: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

07/28/2009 🔍
07/28/2009 +0 days 🔍
07/28/2009 +0 days 🔍
07/28/2009 +0 days 🔍
07/29/2009 +1 days 🔍
07/29/2009 +0 days 🔍
08/07/2009 +9 days 🔍
09/02/2009 +26 days 🔍
09/06/2009 +4 days 🔍
03/18/2015 +2019 days 🔍
10/09/2025 +3858 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Francisco Falcon
Organization: CORE Security Technologies
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-2620 (🔍)
GCVE (CVE): GCVE-0-2009-2620
GCVE (VulDB): GCVE-100-49199
X-Force: 52121
SecurityFocus: 35842 - Firebird 'op_connect_request' Remote Denial Of Service Vulnerability
OSVDB: 56606 - Firebird - 'op_connect_request' Remote Denial Of Service Issue
Vulnerability Center: 23398 - Firebird SQL fbserver.exe Remote DoS Vulnerability via a Malformed op_connect_request Message, High

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/18/2015 15:15
Updated: 10/09/2025 23:16
Changes: 03/18/2015 15:15 (75), 07/08/2019 11:57 (15), 12/07/2024 20:43 (19), 03/30/2025 04:39 (2), 10/09/2025 23:16 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!