Mozilla Firefox up to 49 Shortcut File input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3$0-$5k0.86

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 49. It has been classified as problematic. Impacted is an unknown function of the component Shortcut File Handler. This manipulation causes input validation. This vulnerability is tracked as CVE-2016-5291. The attack is restricted to local execution. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Mozilla Firefox up to 49 (Web Browser). Affected by this vulnerability is an unknown code block of the component Shortcut File Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A same-origin policy bypass with local shortcut files to load arbitrary local content from disk. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

The weakness was disclosed 11/15/2016 as MFSA 2016-89 as confirmed security advisory (Website). The advisory is shared at mozilla.org. This vulnerability is known as CVE-2016-5291. The exploitation appears to be easy. An attack has to be approached locally. The requirement for exploitation is a single authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 900015 (Debian DLA-752-1 : icedove security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236194 (Red Hat Update for firefox (RHSA-2016:2780)).

Upgrading to version 50 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 Tenable (900015), SecurityFocus (BID 94336†) and SecurityTracker (ID 1037298†). The entries VDB-93624, VDB-93625, VDB-93626 and VDB-93627 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 900015
Nessus Name: Debian DLA-752-1 : icedove security update
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for firefox CESA-2016:2780 centos6
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 50

Timelineinfo

11/15/2016 🔍
11/15/2016 +0 days 🔍
11/16/2016 +1 days 🔍
11/16/2016 +0 days 🔍
06/11/2018 +571 days 🔍
11/25/2025 +2724 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2016-89
Status: Confirmed

CVE: CVE-2016-5291 (🔍)
GCVE (CVE): GCVE-0-2016-5291
GCVE (VulDB): GCVE-100-93637

OVAL: 🔍

SecurityFocus: 94336
SecurityTracker: 1037298 - Mozilla Firefox Multiple Bugs Let Remote Users Execute Arbitrary Code, Bypass Security Restrictions, Spoof URLs, Modify Files, and Obtain Potentially Sensitive Information

See also: 🔍

Entryinfo

Created: 11/16/2016 14:03
Updated: 11/25/2025 22:55
Changes: 11/16/2016 14:03 (46), 01/31/2018 09:56 (24), 11/25/2025 22:55 (27)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!