Mozilla Firefox up to 90.x on Android Fullscreen Mode 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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4.1$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Mozilla Firefox up to 90.x on Android. The affected element is an unknown function of the component Fullscreen Mode. The manipulation results in denial of service. This vulnerability is cataloged as CVE-2021-29983. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Mozilla Firefox up to 90.x on Android (Web Browser). Affected is an unknown part of the component Fullscreen Mode. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

The weakness was shared 08/18/2021. The advisory is shared for download at mozilla.org. This vulnerability is traded as CVE-2021-29983. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 249818 (Linux Distros Unpatched Vulnerability : CVE-2021-29983), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 91.0 eliminates this vulnerability. The upgrade is hosted for download at mozilla.org.

The vulnerability is also documented in the vulnerability database at Tenable (249818). 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: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
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: 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: 249818
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-29983

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 91.0

Timelineinfo

04/01/2021 🔍
08/18/2021 +139 days 🔍
08/18/2021 +0 days 🔍
08/18/2025 +1461 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: mozilla.org
Status: Confirmed

CVE: CVE-2021-29983 (🔍)
GCVE (CVE): GCVE-0-2021-29983
GCVE (VulDB): GCVE-100-181044
scip Labs: https://www.scip.ch/en/?labs.20130704

Entryinfo

Created: 08/18/2021 10:15
Updated: 08/18/2025 11:59
Changes: 08/18/2021 10:15 (42), 08/19/2021 20:51 (2), 08/18/2025 11:59 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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