Mozilla Firefox/Firefox ESR/Thunderbird CSS infinite loop

Summaryinfo

A vulnerability was found in Mozilla Firefox, Firefox ESR and Thunderbird and classified as problematic. This affects an unknown function of the component CSS Handler. Such manipulation leads to infinite loop. This vulnerability is traded as CVE-2020-15654. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Mozilla Firefox, Firefox ESR and Thunderbird (Web Browser) (the affected version is unknown). Affected by this issue is an unknown code of the component CSS Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. CVE summarizes:

When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

The weakness was shared 08/10/2020 as Bug 1648333 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.mozilla.org. This vulnerability is handled as CVE-2020-15654 since 07/10/2020. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading eliminates this vulnerability.

The entries VDB-159468, VDB-159467, VDB-159466 and VDB-159465 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox
• Firefox ESR
• Thunderbird

License

• open-source

Website

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

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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