Mozilla Firefox up to 128 WebAssembly type confusion

CVSS Meta Temp Score
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CTI Interest Score
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7.9$5k-$25k0.00

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 128. It has been classified as critical. Affected by this issue is some unknown functionality of the component WebAssembly. Performing a manipulation results in type confusion. This vulnerability is reported as CVE-2024-7520. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 128. This affects an unknown code block of the component WebAssembly. The manipulation with an unknown input leads to a type confusion vulnerability. CWE is classifying the issue as CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A type confusion bug in WebAssembly could be leveraged by an attacker to potentially achieve code execution. This vulnerability affects Firefox < 129 and Firefox ESR < 128.1.

It is possible to read the advisory at bugzilla.mozilla.org. This vulnerability is uniquely identified as CVE-2024-7520 since 08/06/2024. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. 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 $5k-$25k at the moment (estimation calculated on 09/27/2024).

The vulnerability scanner Nessus provides a plugin with the ID 207803 (Oracle Linux 7 : firefox (ELSA-2024-5324)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 129 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (207803). Statistical analysis made it clear that VulDB provides the best quality 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: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector (mozilla): 🔍

CVSSv2info

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

Exploitinginfo

Class: Type confusion
CWE: CWE-843
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: 207803
Nessus Name: Oracle Linux 7 : firefox (ELSA-2024-5324)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 129

Timelineinfo

08/06/2024 🔍
08/06/2024 +0 days 🔍
08/06/2024 +0 days 🔍
03/15/2025 +221 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2024-7520 (🔍)
GCVE (CVE): GCVE-0-2024-7520
GCVE (VulDB): GCVE-100-273747

Entryinfo

Created: 08/06/2024 15:38
Updated: 03/15/2025 20:12
Changes: 08/06/2024 15:38 (55), 08/13/2024 06:08 (22), 09/27/2024 13:02 (2), 03/15/2025 20:12 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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