Mozilla Firefox 44 Deleted Pointer Object use after free

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.
7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Mozilla Firefox 44. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component Deleted Pointer Handler. This manipulation causes use after free (Object). This vulnerability is registered as CVE-2016-1976. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Mozilla Firefox 44 (Web Browser). Affected by this vulnerability is an unknown function of the component Deleted Pointer Handler. The manipulation with an unknown input leads to a use after free vulnerability (Object). The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Use-after-free vulnerability in the DesktopDisplayDevice class in the WebRTC implementation in Mozilla Firefox before 45.0 on Windows might allow remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.

The weakness was published 03/08/2016 by Ronald Crane as MFSA 2016-32 as confirmed security advisory (Website). It is possible to read the advisory at mozilla.org. This vulnerability is known as CVE-2016-1976 since 01/20/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/11/2024).

The vulnerability scanner Nessus provides a plugin with the ID 89765 (FreeBSD : mozilla -- multiple vulnerabilities (2225c5b4-1e5a-44fc-9920-b3201c384a15)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124781 (Mozilla Firefox Multiple Vulnerabilities (MFSA 2016-16 to MFSA 2016-38)).

Upgrading 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 (111356), Tenable (89765), SecurityFocus (BID 84220†) and Vulnerability Center (SBV-57164†). Similar entries are available at VDB-81202, VDB-81204, VDB-81205 and VDB-81208. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.0

VulDB Base Score: 9.8
VulDB Temp Score: 8.5
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

Name: Object
Class: Use after free / Object
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: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 89765
Nessus Name: FreeBSD : mozilla -- multiple vulnerabilities (2225c5b4-1e5a-44fc-9920-b3201c384a15)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802891
OpenVAS Name: Mozilla Firefox Multiple Vulnerabilities - Mar16 (Windows)
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: 🔍

Timelineinfo

01/20/2016 🔍
03/07/2016 +47 days 🔍
03/07/2016 +0 days 🔍
03/08/2016 +0 days 🔍
03/08/2016 +0 days 🔍
03/08/2016 +0 days 🔍
03/08/2016 +0 days 🔍
03/09/2016 +0 days 🔍
03/13/2016 +4 days 🔍
10/11/2024 +3134 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2016-32
Researcher: Ronald Crane
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-1976 (🔍)
GCVE (CVE): GCVE-0-2016-1976
GCVE (VulDB): GCVE-100-81235
X-Force: 111356 - Mozilla Firefox deleted pointers security bypass
SecurityFocus: 84220 - Mozilla Firefox Multiple Security Vulnerabilities
SecurityTracker: 1035215
Vulnerability Center: 57164 - Mozilla Firefox <45 on Windows Remote Unspecified Vulnerability DesktopDisplayDevice::operator= in WebRTC and LibVPX - CVE-2016-1976, Medium

See also: 🔍

Entryinfo

Created: 03/09/2016 10:22
Updated: 10/11/2024 14:28
Changes: 03/09/2016 10:22 (69), 09/02/2018 10:37 (19), 07/09/2022 14:23 (4), 10/11/2024 14:28 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!