Mozilla Firefox Network Security Services Marvin Attack response discrepancy

Summaryinfo

A vulnerability marked as problematic has been reported in Mozilla Firefox. This issue affects some unknown processing of the component Network Security Services. The manipulation leads to response discrepancy. This vulnerability is documented as CVE-2023-5388. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox (the affected version is unknown) and classified as problematic. This issue affects an unknown code of the component Network Security Services. The manipulation with an unknown input leads to a response discrepancy vulnerability. Using CWE to declare the problem leads to CWE-204. The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere. Impacted is confidentiality. The summary by CVE is:

NSS was susceptible to a timing side-channel attack when performing RSA decryption. This attack could potentially allow an attacker to recover the private data. This vulnerability affects Firefox < 124, Firefox ESR < 115.9, and Thunderbird < 115.9.

The advisory is shared at mozilla.org. The identification of this vulnerability is CVE-2023-5388 since 10/04/2023. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/18/2025). MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 239942 (TencentOS Server 2: firefox (TSSA-2024:0095)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (239942). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox

License

• open-source

Website

• Vendor: https://www.mozilla.org/
• Product: https://www.mozilla.org/en-US/firefox/

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• 🔍

CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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