Mastodon up to 3.5.8/4.0.4/4.1.2 Verified Profile Link input validation

Summaryinfo

A vulnerability marked as critical has been reported in Mastodon up to 3.5.8/4.0.4/4.1.2. Affected is an unknown function of the component Verified Profile Link Handler. Performing a manipulation results in input validation. This vulnerability is known as CVE-2023-36462. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Mastodon up to 3.5.8/4.0.4/4.1.2. This affects an unknown code of the component Verified Profile Link Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 2.6.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, an attacker can craft a verified profile link using specific formatting to conceal arbitrary parts of the link, enabling it to appear to link to a different URL altogether. The link is visually misleading, but clicking on it will reveal the actual link. This can still be used for phishing, though, similar to IDN homograph attacks. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.

The weakness was published 07/07/2023 as GHSA-55j9-c3mp-6fcq. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2023-36462 since 06/21/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 3.5.9, 4.0.5 or 4.1.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 610731b03dfcadd887078cb0399f4e514aa1931c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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

Productinfo

Name

• Mastodon

Version

• 3.5.0
• 3.5.1
• 3.5.2
• 3.5.3
• 3.5.4
• 3.5.5
• 3.5.6
• 3.5.7
• 3.5.8
• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.1.0
• 4.1.1
• 4.1.2

License

• open-source

Website

• Product: https://github.com/mastodon/mastodon/

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CPE 2.2info

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

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