Mozilla Firefox up to 79.x MAR Update File heap-based overflow

Summaryinfo

A vulnerability classified as critical was found in Mozilla Firefox up to 79.x. Affected by this vulnerability is an unknown functionality of the component MAR Update File Handler. The manipulation results in heap-based overflow. This vulnerability is reported as CVE-2020-15667. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Mozilla Firefox up to 79.x (Web Browser). Affected is an unknown function of the component MAR Update File Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

When processing a MAR update file, after the signature has been validated, an invalid name length could result in a heap overflow, leading to memory corruption and potentially arbitrary code execution. Within Firefox as released by Mozilla, this issue is only exploitable with the Mozilla-controlled signing key. This vulnerability affects Firefox < 80.

The weakness was disclosed 10/01/2020 as Bug 1653371 as not defined bug report (Bugzilla). The advisory is available at bugzilla.mozilla.org. This vulnerability is traded as CVE-2020-15667 since 07/10/2020. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/14/2020).

Upgrading to version 80.0 eliminates this vulnerability.

The entries VDB-162166, VDB-162163, VDB-162161 and VDB-162160 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox

Version

• 79.x

License

• open-source

Website

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

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• 🔍

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• 🔍

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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