Mozilla Firefox LiveConnect denial of service

CVSS Meta Temp Score
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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.

A vulnerability, which was classified as critical, has been found in Mozilla Firefox (Web Browser). Affected by this issue is some unknown functionality of the component LiveConnect. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The program does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The weakness was shared 12/19/2006 by Steven Michaud (moz_bug_r_a4) as MFSA2006-71 as confirmed advisory (Website). The advisory is available at This vulnerability is handled as CVE-2006-6497 since 12/13/2006. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 67432 (Oracle Linux 4 : thunderbird (ELSA-2006-0760)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156235 (Oracle Enterprise Linux Update for Firefox (ELSA-2006:0758)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 months after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 15999. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 9089.

The vulnerability is also documented in the databases at X-Force (30992), SecurityTracker (ID 1017413), Vulnerability Center (SBV-13420) and Tenable (67432). is providing further details. The entries 2770, 2771, 2777 and 2769 are related to this item.






  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
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Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 67432
Nessus Name: Oracle Linux 4 : thunderbird (ELSA-2006-0760)
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OpenVAS ID: 57829
OpenVAS Name: Debian Security Advisory DSA 1253-1 (mozilla-firefox)
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Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

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Snort ID: 15999
TippingPoint: 🔍
PaloAlto IPS: 🔍


12/13/2006 🔍
12/19/2006 +6 days 🔍
12/19/2006 +0 days 🔍
12/19/2006 +0 days 🔍
12/19/2006 +0 days 🔍
12/19/2006 +0 days 🔍
12/20/2006 +0 days 🔍
12/20/2006 +0 days 🔍
12/21/2006 +1 days 🔍
01/27/2007 +37 days 🔍
07/12/2013 +2358 days 🔍
03/13/2021 +2801 days 🔍



Advisory: MFSA2006-71
Researcher: Steven Michaud (moz_bug_r_a4)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-6497 (🔍)

X-Force: 30992
SecurityTracker: 1017413 - Mozilla Firefox LiveConnect May Use Freed JavaScript Objects and Execute Arbitrary Code
Vulnerability Center: 13420 - Mozilla Web-Browsers Layout Engine Vulnerabilities, Medium
SecurityFocus: 21668 - Mozilla Firefox/SeaMonkey/Thunderbird Multiple Remote Vulnerabilities
Secunia: 23282 - Mozilla Firefox Multiple Vulnerabilities, Highly Critical
OSVDB: 31341 - Mozilla Multiple Products SVG Processing Remote Code Execution

Misc.: 🔍
See also: 🔍


Created: 12/21/2006 10:15 AM
Updated: 03/13/2021 06:04 PM
Changes: 12/21/2006 10:15 AM (94), 01/31/2018 09:52 AM (12), 03/13/2021 06:04 PM (2)
Complete: 🔍


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