Mastodon up to 3.5.8/4.0.4/4.1.2 Media File path traversal

Summaryinfo

A vulnerability was found in Mastodon up to 3.5.8/4.0.4/4.1.2. It has been rated as critical. The affected element is an unknown function of the component Media File Handler. The manipulation leads to path traversal. This vulnerability is documented as CVE-2023-36460. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Mastodon up to 3.5.8/4.0.4/4.1.2. It has been rated as critical. This issue affects an unknown function of the component Media File Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 3.5.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, attackers using carefully crafted media files can cause Mastodon's media processing code to create arbitrary files at any location. This allows attackers to create and overwrite any file Mastodon has access to, allowing Denial of Service and arbitrary Remote Code Execution. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.

The weakness was released 07/06/2023 as GHSA-9928-3cp5-93fm. The advisory is shared at github.com. The identification of this vulnerability is CVE-2023-36460 since 06/21/2023. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

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 dc8f1fbd976ae544720a4e07120d9a91b2722440 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.

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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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