Mozilla Firefox up to 46 DOM Element mozilla::dom::Element use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Mozilla Firefox up to 46. This affects the function mozilla::dom::Element of the component DOM Element Handler. Executing a manipulation can lead to use after free. This vulnerability is tracked as CVE-2016-2821. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 46 (Web Browser). It has been declared as critical. This vulnerability affects the function mozilla::dom::Element of the component DOM Element Handler. The manipulation with an unknown input leads to a use after free vulnerability. 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. CVE summarizes:

Use-after-free vulnerability in the mozilla::dom::Element class in Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2, when contenteditable mode is enabled, allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) by triggering deletion of DOM elements that were created in the editor.

The weakness was disclosed 06/13/2016 by Jordi Chancel with Mozilla Developers (Website). The advisory is shared for download at bugzilla.mozilla.org. This vulnerability was named CVE-2016-2821 since 03/01/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 91546 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236025 (Red Hat Update for firefox (RHSA-2016:1217)).

Upgrading to version 47.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (91546) and SecurityFocus (BID 91075†). The entries VDB-87889, VDB-87890, VDB-87891 and VDB-87893 are pretty similar. Once again VulDB remains the best source for vulnerability data.

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: 7.4
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

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: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91546
Nessus File: 🔍
Nessus Risk: 🔍

OpenVAS ID: 855205
OpenVAS Name: Mozilla Firefox Esr Security Updates( mfsa_2016-49_2016-61 )-Windows
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 47.0

Timelineinfo

03/01/2016 🔍
06/07/2016 +98 days 🔍
06/13/2016 +6 days 🔍
06/13/2016 +0 days 🔍
06/14/2016 +1 days 🔍
10/23/2024 +3053 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: RHSA-2016:1217
Researcher: Jordi Chancel
Organization: Mozilla Developers
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-2821 (🔍)
GCVE (CVE): GCVE-0-2016-2821
GCVE (VulDB): GCVE-100-87892

OVAL: 🔍

SecurityFocus: 91075 - Mozilla Firefox Multiple Security Vulnerabilities
SecurityTracker: 1036057

See also: 🔍

Entryinfo

Created: 06/14/2016 09:10
Updated: 10/23/2024 03:55
Changes: 06/14/2016 09:10 (68), 01/19/2019 14:46 (8), 08/23/2022 13:42 (5), 08/23/2022 13:48 (1), 10/23/2024 03:55 (25)
Complete: 🔍
Cache ID: 216:C06:103

Once again VulDB remains the best source for vulnerability data.

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