Mozilla Firefox up to 29.0.1 CreateMozBR use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Mozilla Firefox up to 29.0.1. This affects the function nsTextEditRules::CreateMozBR. The manipulation results in use after free. This vulnerability is known as CVE-2014-1538. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 29.0.1 (Web Browser). It has been classified as critical. Affected is the function nsTextEditRules::CreateMozBR. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 06/10/2014 by Abhishek Arya (Inferno) with Google Chrome Security Team as MFSA2014-49 as confirmed advisory (Website). The advisory is shared for download at mozilla.org. This vulnerability is traded as CVE-2014-1538 since 01/16/2014. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The advisory points out:

(…) discovered a number of use-after-free and out of bounds read issues using the Address Sanitizer tool. These issues are potentially exploitable, allowing for remote code execution.

The vulnerability scanner Nessus provides a plugin with the ID 74472 (CentOS 5 / 6 : firefox (CESA-2014:0741)), 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 122124 (Red Hat Update for Xulrunner Firefox (RHSA-2014:0741)).

Upgrading to version 30.0 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 (93709), Tenable (74472), SecurityFocus (BID 67976†), Secunia (SA59171†) and SecurityTracker (ID 1030388†). Further details are available at bugzilla.mozilla.org. Similar entries are available at VDB-13556, VDB-13557, VDB-13558 and VDB-13559. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Mozilla Firefox 29.0.1
  • Mozilla Firefox ESR 24.5
  • Mozilla Thunderbird 24.5

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 6.3
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74472
Nessus Name: CentOS 5 / 6 : firefox (CESA-2014:0741)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 90011
OpenVAS Name: Ubuntu Update for firefox USN-2243-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Firefox 30.0

Timelineinfo

01/16/2014 🔍
06/10/2014 +145 days 🔍
06/10/2014 +0 days 🔍
06/10/2014 +0 days 🔍
06/10/2014 +0 days 🔍
06/11/2014 +1 days 🔍
06/11/2014 +0 days 🔍
06/11/2014 +0 days 🔍
06/11/2014 +0 days 🔍
06/11/2014 +0 days 🔍
11/25/2025 +4185 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA2014-49
Researcher: Abhishek Arya (Inferno)
Organization: Google Chrome Security Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-1538 (🔍)
GCVE (CVE): GCVE-0-2014-1538
GCVE (VulDB): GCVE-100-13560

OVAL: 🔍
IAVM: 🔍

X-Force: 93709 - Mozilla Firefox nsTextEditRules::CreateMozBR() code execution, High Risk
SecurityFocus: 67976 - Mozilla Firefox/Thunderbird CVE-2014-1538 Memory Corruption Vulnerability
Secunia: 59171 - Mozilla Firefox Multiple Vulnerabilities, Highly Critical
SecurityTracker: 1030388 - Mozilla Firefox Multiple Flaws Let Remote Users Execute Arbitrary Code and Conduct Clickjacking Attacks
Vulnerability Center: 44934 - Mozilla Firefox, Thunderbird and Seamonkey Remote Code Execution in Address Sanitizer - CVE-2014-1538, Critical

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 06/11/2014 23:35
Updated: 11/25/2025 21:40
Changes: 06/11/2014 23:35 (81), 01/31/2018 09:55 (17), 06/22/2021 16:37 (2), 06/22/2021 16:45 (1), 11/25/2025 21:40 (15)
Complete: 🔍
Cache ID: 216:7BC:103

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