Mozilla Firefox 17.0 IsClusterStart memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

A vulnerability, which was classified as critical, was found in Mozilla Firefox 17.0 (Web Browser). This affects the function gfxShapedWord::CompressedGlyph::IsClusterStart. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Heap-based buffer overflow in the gfxShapedWord::CompressedGlyph::IsClusterStart function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code via unspecified vectors.

The weakness was published 11/20/2012 by Abhishek Arya (Inferno) with Google Chrome Security as MFSA 2012-105 as confirmed advisory (Mozilla Blog). The advisory is shared at mozilla.org. The public release has been coordinated with Mozilla. This vulnerability is uniquely identified as CVE-2012-5839 since 11/05/2012. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details and a private exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/19/2021).

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 63005 (CentOS 5 / 6 : firefox (CESA-2012:1482)), 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 120702 (Red Hat Update for Xulrunner Firefox (RHSA-2012:1482)).

Upgrading to version 17.0 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 (80196) and Tenable (63005). Similar entries are available at 6971, 6972, 6973 and 6974.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 7.5

VulDB Base Score: 8.3
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 63005
Nessus Name: CentOS 5 / 6 : firefox (CESA-2012:1482)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 72599
OpenVAS Name: FreeBSD Ports: firefox
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Firefox 17.0

Timelineinfo

11/05/2012 🔍
11/20/2012 +15 days 🔍
11/20/2012 +0 days 🔍
11/20/2012 +0 days 🔍
11/20/2012 +0 days 🔍
11/21/2012 +1 days 🔍
11/21/2012 +0 days 🔍
11/21/2012 +0 days 🔍
11/25/2012 +4 days 🔍
11/26/2012 +1 days 🔍
04/19/2021 +3066 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2012-105
Researcher: Abhishek Arya (Inferno)
Organization: Google Chrome Security
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-5839 (🔍)
OVAL: 🔍

X-Force: 80196 - Mozilla Firefox, Thunderbird, and SeaMonkey gfxShapedWord::CompressedGlyph::IsClusterStart() buffer overflow, High Risk
SecurityTracker: 1027791 - Mozilla Firefox Multiple Bugs Let Remote Users Execute Arbitrary Code and Conduct Cross-Site Scripting Attacks
Vulnerability Center: 37376 - Mozilla Firefox, Thunderbird and SeaMonkey Arbitrary Code Execution Vulnerability - CVE-2012-5839, Critical
SecurityFocus: 56637 - Mozilla Firefox/Thunderbird/SeaMonkey CVE-2012-5839 Heap Buffer Overflow Vulnerability
Secunia: 51358 - Mozilla Firefox / Thunderbird Multiple Vulnerabilities, Highly Critical
OSVDB: 87607

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

Entryinfo

Created: 11/26/2012 13:36
Updated: 04/19/2021 14:46
Changes: 11/26/2012 13:36 (92), 01/31/2018 09:53 (4), 04/19/2021 14:46 (2)
Complete: 🔍

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