Mozilla Firefox/Firefox ESR/Thunderbird Garbage Collector denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Mozilla Firefox, Firefox ESR and Thunderbird and classified as problematic. This affects an unknown function of the component Garbage Collector. The manipulation leads to denial of service. This vulnerability is listed as CVE-2021-23960. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Mozilla Firefox, Firefox ESR and Thunderbird (Web Browser) (the affected version unknown). This issue affects an unknown part of the component Garbage Collector. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The weakness was presented 02/26/2021. The advisory is shared at mozilla.org. The identification of this vulnerability is CVE-2021-23960. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 208628 (CentOS 7 : thunderbird (RHSA-2021:0297)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability. The upgrade is hosted for download at mozilla.org.

The vulnerability is also documented in the vulnerability database at Tenable (208628). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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: 208628
Nessus Name: CentOS 7 : thunderbird (RHSA-2021:0297)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: mozilla.org

Timelineinfo

01/13/2021 🔍
02/26/2021 +44 days 🔍
02/26/2021 +0 days 🔍
05/04/2025 +1528 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: mozilla.org
Status: Confirmed

CVE: CVE-2021-23960 (🔍)
GCVE (CVE): GCVE-0-2021-23960
GCVE (VulDB): GCVE-100-170453

Entryinfo

Created: 02/26/2021 09:49
Updated: 05/04/2025 05:49
Changes: 02/26/2021 09:49 (39), 03/05/2021 13:39 (5), 03/05/2021 13:41 (18), 10/13/2024 03:17 (17), 05/04/2025 05:49 (3)
Complete: 🔍
Cache ID: 216::103

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

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