Mozilla Firefox/Firefox ESR/Thunderbird Location API infinite loop

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.00

A vulnerability classified as problematic was found in Mozilla Firefox, Firefox ESR and Thunderbird (Web Browser) (affected version unknown). Affected by this vulnerability is an unknown functionality of the component Location API. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-835. As an impact it is known to affect availability. The summary by CVE is:

Using the Location API in a loop could have caused severe application hangs and crashes. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

The weakness was disclosed 12/09/2021. It is possible to read the advisory at mozilla.org. This vulnerability is known as CVE-2021-43545 since 11/08/2021. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. 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 12/12/2021). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability.

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CVSSv3infoedit

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

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

CVSSv2infoedit

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

Exploitinginfoedit

Class: Denial of service
CWE: CWE-835
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

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

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: mozilla.org

Timelineinfoedit

11/08/2021 CVE assigned
12/09/2021 +31 days Advisory disclosed
12/09/2021 +0 days VulDB entry created
12/12/2021 +3 days VulDB last update

Sourcesinfoedit

Vendor: https://www.mozilla.org/

Advisory: mozilla.org
Status: Confirmed

CVE: CVE-2021-43545 (🔒)

Entryinfoedit

Created: 12/09/2021 09:00 AM
Updated: 12/12/2021 02:32 AM
Changes: (1) source_cve_nvd_summary
Complete: 🔍

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