Mozilla Firefox up to 47 on Windows Updater access control

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k0.00

A vulnerability classified as problematic has been found in Mozilla Firefox up to 47 on Windows (Web Browser). Affected is some unknown processing of the component Updater. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The Updater in Mozilla Firefox before 48.0 on Windows allows local users to write to arbitrary files via vectors involving the callback application-path parameter and a hard link.

The weakness was disclosed 08/02/2016 by Holger Fuhrmannek (musicDespiteEverything) as MFSA 2016-69 as confirmed security advisory (Website). The advisory is shared for download at mozilla.org. This vulnerability is traded as CVE-2016-5253 since 06/03/2016. The exploitability is told to be easy. The attack needs to be approached locally. Required for exploitation is a authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

Security researcher Holger Fuhrmannek reported that when the Updater is opened directly using the callback application path parameter, a copy of a user specified file is made as a callback file. If the target of this file is made with a locked hardlink, an arbitrary local file can be replaced on the system even if there is no privileged write access to the targeted file. If this targeted file is run by other processes with privileges, this could allow for arbitrary code execution by a malicious user with local system access. This is not exploitable by web content.

The vulnerability scanner Nessus provides a plugin with the ID 92755 (Firefox < 48 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370108 (Mozilla Firefox Multiple Vulnerabilities (MFSA 2016-62 to MFSA 2016-84)).

Upgrading to version 48 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (92755). The entries 90424, 90425, 90426 and 90427 are pretty similar.

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: 4.7
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 92755
Nessus Name: Firefox < 48 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802170
OpenVAS Name: Mozilla Firefox Security Updates( mfsa_2016-62_2016-84 )-Windows
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Firefox 48

Timelineinfo

06/03/2016 🔍
08/02/2016 +60 days 🔍
08/02/2016 +0 days 🔍
08/02/2016 +0 days 🔍
08/03/2016 +1 days 🔍
08/04/2016 +1 days 🔍
08/04/2016 +0 days 🔍
08/05/2016 +1 days 🔍
03/16/2019 +953 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2016-69
Researcher: Holger Fuhrmannek (musicDespiteEverything)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-5253 (🔍)
OVAL: 🔍

SecurityTracker: 1036508
SecurityFocus: 92260 - Mozilla Firefox Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 08/04/2016 09:21
Updated: 03/16/2019 20:52
Changes: 08/04/2016 09:21 (77), 03/16/2019 20:52 (13)
Complete: 🔍

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