Mozilla Network Security Services TLS Marvin Attack timing discrepancy

Summaryinfo

A vulnerability marked as critical has been reported in Mozilla Network Security Services. This issue affects some unknown processing of the component TLS Handler. This manipulation causes timing discrepancy. This vulnerability appears as CVE-2023-5388. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Mozilla Network Security Services (Web Browser) (the affected version is unknown). It has been declared as problematic. Affected by this vulnerability is an unknown code of the component TLS Handler. The manipulation with an unknown input leads to a timing discrepancy vulnerability. The CWE definition for the vulnerability is CWE-208. Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. As an impact it is known to affect 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 weakness was presented 10/16/2023. It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2023-5388 since 10/04/2023. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

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.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at hg.mozilla.org.

The vulnerability is also documented in the vulnerability database at Tenable (239942). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Network Security Services

License

• open-source

Website

• Vendor: https://www.mozilla.org/

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CPE 2.2info

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

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