Mozilla Firefox/Thunderbird 15 select authentication spoofing

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability has been found in Mozilla Firefox and Thunderbird 15 (Web Browser) and classified as problematic. This vulnerability affects an unknown part. The manipulation of the argument select with an unknown input leads to a authentication spoofing vulnerability. The CWE definition for the vulnerability is CWE-290. This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. As an impact it is known to affect integrity. CVE summarizes:

Mozilla Firefox before 16.0, Thunderbird before 16.0, and SeaMonkey before 2.13 do not properly handle navigation away from a web page that has a SELECT element s menu active, which allows remote attackers to spoof page content via vectors involving absolute positioning and scrolling.

The weakness was released 10/09/2012 by David Bloom (Cue) as mfsa2012-75 as confirmed advisory (Website). The advisory is available at The public release was coordinated with the vendor. This vulnerability was named CVE-2012-3984 since 07/11/2012. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 62490 (FreeBSD : mozilla -- multiple vulnerabilities (6e5a9afd-12d3-11e2-b47d-c8600054b392)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165422 (SUSE Enterprise Linux Security Update for Mozilla Firefox (SUSE-SU-2012:1351-1)).

Upgrading to version 16 eliminates this vulnerability. The upgrade is hosted for download at A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (79145) and Tenable (62490). Entries connected to this vulnerability are available at 6636, 6637, 6639 and 6640.







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
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Class: Authentication spoofing
CWE: CWE-290 / CWE-287
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 62490
Nessus Name: FreeBSD : mozilla -- multiple vulnerabilities (6e5a9afd-12d3-11e2-b47d-c8600054b392)
Nessus File: 🔍
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OpenVAS ID: 72477
OpenVAS Name: FreeBSD Ports: firefox
OpenVAS File: 🔍
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Threat Intelligenceinfo

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Recommended: Upgrade
Status: 🔍

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Upgrade: Firefox/Thunderbird 16


07/11/2012 🔍
10/09/2012 +90 days 🔍
10/09/2012 +0 days 🔍
10/09/2012 +0 days 🔍
10/10/2012 +1 days 🔍
10/10/2012 +0 days 🔍
10/10/2012 +0 days 🔍
10/10/2012 +0 days 🔍
10/10/2012 +0 days 🔍
10/11/2012 +1 days 🔍
10/12/2012 +1 days 🔍
04/18/2021 +3110 days 🔍



Advisory: mfsa2012-75
Researcher: David Bloom (Cue)
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-3984 (🔍)

X-Force: 79145
SecurityTracker: 1027631 - Mozilla Firefox Multiple Bugs Let Remote Users Execute Arbitrary Code, Spoof Information, and Inject Scripting Code
Vulnerability Center: 36455 - Mozilla Firefox < 16.0, Thunderbird < 16.0, and SeaMonkey < 2.13 SELECT Spoofing Vulnerability, Medium
SecurityFocus: 55932 - Mozilla Firefox/Thunderbird/SeaMonkey CVE-2012-3984 Address Bar URI Spoofing Vulnerability
Secunia: 50935 - Mozilla SeaMonkey Multiple Vulnerabilities, Highly Critical
OSVDB: 86105

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Created: 10/12/2012 11:37 AM
Updated: 04/18/2021 07:53 AM
Changes: 10/12/2012 11:37 AM (81), 01/31/2018 09:54 AM (11), 04/18/2021 07:53 AM (3)
Complete: 🔍


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