Mozilla Firefox/Firefox ESR/Thunderbird Accessibility use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Mozilla Firefox, Firefox ESR and Thunderbird. This affects an unknown function of the component Accessibility. Such manipulation leads to use after free. This vulnerability is uniquely identified as CVE-2021-29970. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox, Firefox ESR and Thunderbird (Web Browser) (version unknown). Affected by this issue is an unknown function of the component Accessibility. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 07/13/2021. The advisory is shared for download at mozilla.org. This vulnerability is handled as CVE-2021-29970. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/13/2024).

The vulnerability scanner Nessus provides a plugin with the ID 208618 (CentOS 7 : thunderbird (RHSA-2021:2881)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (208618). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

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: 208618
Nessus Name: CentOS 7 : thunderbird (RHSA-2021:2881)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/01/2021 🔍
07/13/2021 +103 days 🔍
07/13/2021 +0 days 🔍
05/03/2025 +1390 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: mozilla.org
Status: Confirmed

CVE: CVE-2021-29970 (🔍)
GCVE (CVE): GCVE-0-2021-29970
GCVE (VulDB): GCVE-100-178472

Entryinfo

Created: 07/13/2021 19:01
Updated: 05/03/2025 16:53
Changes: 07/13/2021 19:01 (41), 07/16/2021 14:35 (4), 08/06/2021 10:41 (5), 10/13/2024 08:50 (16), 05/03/2025 16:53 (3)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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