Mozilla Firefox 34.0.5 Bitmap Render canvas information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as critical was found in Mozilla Firefox 34.0.5 (Web Browser). Affected by this vulnerability is some unknown processing of the component Bitmap Render. The manipulation of the argument canvas as part of a BMP Image leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was shared 01/13/2015 by Michal Zalewski with Google as MFSA2015-02 as confirmed advisory (Website). It is possible to read the advisory at The vendor cooperated in the coordination of the public release. This vulnerability is known as CVE-2014-8637 since 11/06/2014. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK. The advisory points out:

Google security researcher Michal Zalewski reported that when a malformed bitmap image is rendered by the bitmap decoder within a [canvas] element, memory may not always be properly initialized. The resulting image then uses this uninitialized memory during rendering, allowing data to potentially leak to web content.

The vulnerability scanner Nessus provides a plugin with the ID 80538 (FreeBSD : mozilla -- multiple vulnerabilities (bd62c640-9bb9-11e4-a5ad-000c297fb80f)), 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 167588 (OpenSuSE Security Update for seamonkey (openSUSE-SU-2015:0192-1)).

Upgrading to version 35 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (99957) and Tenable (80538). Additional details are provided at The entries 68597, 68598, 68600 and 68601 are related to this item.







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.5

VulDB Base Score: 6.3
VulDB Temp Score: 5.5
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Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
ATT&CK: T1592

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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Nessus ID: 80538
Nessus Name: FreeBSD : mozilla -- multiple vulnerabilities (bd62c640-9bb9-11e4-a5ad-000c297fb80f)
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OpenVAS ID: 803420
OpenVAS Name: Mozilla Firefox Multiple Vulnerabilities-01 Jan15 (Windows)
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Threat Intelligenceinfo

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Recommended: Upgrade
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Upgrade: Firefox 35


11/06/2014 🔍
01/13/2015 +68 days 🔍
01/13/2015 +0 days 🔍
01/13/2015 +0 days 🔍
01/14/2015 +1 days 🔍
01/14/2015 +0 days 🔍
01/14/2015 +0 days 🔍
01/14/2015 +0 days 🔍
01/15/2015 +1 days 🔍
01/15/2015 +0 days 🔍
03/02/2022 +2603 days 🔍



Advisory: MFSA2015-02
Researcher: Michal Zalewski
Organization: Google
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2014-8637 (🔍)
X-Force: 99957 - Mozilla Firefox and SeaMonkey information disclosure, Medium Risk
SecurityTracker: 1031533 - Mozilla Firefox Multiple Flaws Let Remote Users Execute Arbitrary Code, Conduct Cross-Site Request Forgery Attacks, and Obtain Potentially Sensitive Information
Vulnerability Center: 48068 - Mozilla Firefox <35.0 and SeaMonkey <2.32 Remote Information disclosure Vulnerability - CVE-2014-8637, Medium
SecurityFocus: 72048 - Mozilla Firefox/SeaMonkey Bitmap Rendering Information Disclosure Vulnerability
Secunia: 62242 - Ubuntu update for ubufox, Highly Critical

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Created: 01/14/2015 11:14 AM
Updated: 03/02/2022 11:25 AM
Changes: 01/14/2015 11:14 AM (84), 01/31/2018 09:55 AM (10), 03/02/2022 11:17 AM (3), 03/02/2022 11:25 AM (1)
Complete: 🔍


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