Mozilla Firefox up to 125 use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.0$5k-$25k0.00

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 125. It has been declared as critical. Affected is an unknown function. Executing a manipulation can lead to use after free. This vulnerability is registered as CVE-2024-4771. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Mozilla Firefox up to 125. This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A memory allocation check was missing which would lead to a use-after-free if the allocation failed. This could have triggered a crash or potentially be leveraged to achieve code execution. This vulnerability affects Firefox < 126.

The advisory is shared for download at bugzilla.mozilla.org. This vulnerability was named CVE-2024-4771 since 05/10/2024. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. 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 $5k-$25k (estimation calculated on 08/06/2025).

The vulnerability scanner Nessus provides a plugin with the ID 243640 (Linux Distros Unpatched Vulnerability : CVE-2024-4771), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 126 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (243640). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

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: 243640
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2024-4771

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 126

Timelineinfo

05/10/2024 🔍
05/14/2024 +4 days 🔍
05/14/2024 +0 days 🔍
08/06/2025 +449 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2024-4771 (🔍)
GCVE (CVE): GCVE-0-2024-4771
GCVE (VulDB): GCVE-100-264340

Entryinfo

Created: 05/14/2024 20:04
Updated: 08/06/2025 04:51
Changes: 05/14/2024 20:04 (53), 03/30/2025 06:30 (4), 04/02/2025 06:38 (1), 08/06/2025 04:51 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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