Mozilla Firefox/Firefox ESR/Thunderbird Redirect HTTP Request information disclosure

Summaryinfo

A vulnerability was found in Mozilla Firefox, Firefox ESR and Thunderbird. It has been classified as critical. This impacts an unknown function of the component Redirect Handler. Performing a manipulation as part of HTTP Request results in information disclosure. This vulnerability is known as CVE-2020-15655. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Mozilla Firefox, Firefox ESR and Thunderbird (Web Browser) (unknown version). This affects an unknown code block of the component Redirect Handler. The manipulation as part of a HTTP Request leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

The weakness was published 08/10/2020 as Bug 1645204 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.mozilla.org. This vulnerability is uniquely identified as CVE-2020-15655 since 07/10/2020. 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. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading eliminates this vulnerability.

Similar entries are available at VDB-159469, VDB-159468, VDB-159467 and VDB-159466. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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