Mozilla Firefox up to 121 TLS Handshake denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Mozilla Firefox up to 121. Affected by this vulnerability is an unknown functionality of the component TLS Handshake Handler. This manipulation causes denial of service. This vulnerability is registered as CVE-2024-0743. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 121 (Web Browser). It has been declared as problematic. Affected by this vulnerability is some unknown processing of the component TLS Handshake Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

An unchecked return value in TLS handshake code could have caused a potentially exploitable crash. This vulnerability affects Firefox < 122.

The weakness was published 01/23/2024. The advisory is shared at bugzilla.mozilla.org. This vulnerability is known as CVE-2024-0743 since 01/19/2024. 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 209846 (Debian dla-3937 : libnss3 - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 122 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (209846). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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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: 209846
Nessus Name: Debian dla-3937 : libnss3 - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 122

Timelineinfo

01/19/2024 🔍
01/23/2024 +4 days 🔍
01/23/2024 +0 days 🔍
04/20/2025 +453 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2024-0743 (🔍)
GCVE (CVE): GCVE-0-2024-0743
GCVE (VulDB): GCVE-100-251845

Entryinfo

Created: 01/23/2024 15:12
Updated: 04/20/2025 12:51
Changes: 01/23/2024 15:12 (41), 02/17/2024 09:06 (11), 10/28/2024 21:45 (17), 04/20/2025 12:51 (3)
Complete: 🔍
Cache ID: 216::103

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