Mozilla Firefox up to 3.5.3 VariantDataToJS access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Mozilla Firefox up to 3.5.3 (Web Browser). It has been classified as critical. Affected is the function XPCVariant::VariantDataToJS. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 10/29/2009 by moz_bug_r_a4 as MFSA2009-57 as not defined advisory (Website). The advisory is shared for download at This vulnerability is traded as CVE-2009-3374. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 42295 (CentOS 4 : firefox (CESA-2009:1530)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119087 (Red Hat Update for Xulrunner Firefox (RHSA-2009:1530)).

Upgrading to version 3.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (42295). Similar entries are available at 4052, 50808, 50648 and 50647.







CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
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VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 42295
Nessus Name: CentOS 4 : firefox (CESA-2009:1530)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 66146
OpenVAS Name: Debian Security Advisory DSA 1922-1 (xulrunner)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 3.0


09/24/2009 🔍
10/27/2009 +33 days 🔍
10/27/2009 +0 days 🔍
10/29/2009 +2 days 🔍
10/29/2009 +0 days 🔍
10/29/2009 +0 days 🔍
03/18/2015 +1966 days 🔍
08/24/2021 +2351 days 🔍



Advisory: MFSA2009-57
Researcher: moz_bug_r_a4
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-3374 (🔍)

Vulnerability Center: 23891 - Mozilla Firefox Prior to 3.5.4 XPCOM Utility Chrome Remote Privilege Escalation Vulnerability, High
SecurityFocus: 36857 - Mozilla Firefox XPCOM Utility Chrome Privilege Escalation Vulnerability

See also: 🔍


Created: 03/18/2015 03:15 PM
Updated: 08/24/2021 06:58 PM
Changes: 03/18/2015 03:15 PM (64), 01/31/2018 09:55 AM (9), 08/24/2021 06:51 PM (4), 08/24/2021 06:58 PM (1)
Complete: 🔍


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