Mozilla Firefox up to 38.x Worker CanonicalizeXPCOMParticipant use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 38.x. This affects the function CanonicalizeXPCOMParticipant of the component Worker Handler. Performing a manipulation results in use after free. This vulnerability is reported as CVE-2015-2733. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 38.x (Web Browser). This affects the function CanonicalizeXPCOMParticipant of the component Worker Handler. 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 summary by CVE is:

Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 39.0 and Firefox ESR 31.x before 31.8 and 38.x before 38.1 allows remote attackers to execute arbitrary code via vectors involving attachment of an XMLHttpRequest object to a dedicated worker.

The weakness was disclosed 07/06/2015 by Karthikeyan Bhargavan (Paul) with Mozilla Developers (Website). It is possible to read the advisory at bugzilla.mozilla.org. This vulnerability is uniquely identified as CVE-2015-2733 since 03/25/2015. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 84550 (CentOS 5 / 6 / 7 : firefox (CESA-2015:1207)), 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 167966 (OpenSuSE Security Update for MozillaFirefox, mozilla-nss (openSUSE-SU-2015:1229-1)).

Upgrading to version 39.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (104385), Tenable (84550), SecurityFocus (BID 75541†) and Vulnerability Center (SBV-50996†). The entries VDB-76277, VDB-76278, VDB-76279 and VDB-76280 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: 84550
Nessus Name: CentOS 5 / 6 / 7 : firefox (CESA-2015:1207)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 80056
OpenVAS Name: Oracle Linux Local Check: ELSA-2015-1207
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍
Upgrade: Firefox 39.0

Timelineinfo

03/25/2015 🔍
07/02/2015 +99 days 🔍
07/02/2015 +0 days 🔍
07/05/2015 +3 days 🔍
07/05/2015 +0 days 🔍
07/06/2015 +1 days 🔍
07/06/2015 +0 days 🔍
10/22/2024 +3396 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: RHSA-2015:1207
Researcher: Karthikeyan Bhargavan (Paul)
Organization: Mozilla Developers
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-2733 (🔍)
GCVE (CVE): GCVE-0-2015-2733
GCVE (VulDB): GCVE-100-76287
X-Force: 104385 - Mozilla Firefox XMLHttpRequest code execution
SecurityFocus: 75541 - Mozilla Firefox/Thunderbird Multiple Security Vulnerabilities
SecurityTracker: 1032783
Vulnerability Center: 50996 - Mozilla Firefox and Firefox ESR Remote Code Execution due to Use-After-Free in XMLHttpRequest - CVE-2015-2733, Critical

See also: 🔍

Entryinfo

Created: 07/06/2015 10:18
Updated: 10/22/2024 20:17
Changes: 07/06/2015 10:18 (61), 07/03/2017 09:01 (17), 05/23/2022 11:14 (4), 05/23/2022 11:22 (1), 05/23/2022 11:29 (2), 10/22/2024 20:17 (15)
Complete: 🔍
Cache ID: 216::103

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