Ombi up to 4.38.1 SystemControllers.cs path traversal

Summaryinfo

A vulnerability, which was classified as critical, has been found in Ombi up to 4.38.1. Impacted is an unknown function of the file SystemControllers.cs. Performing a manipulation results in path traversal. This vulnerability is reported as CVE-2023-32322. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Ombi up to 4.38.1. This affects an unknown functionality of the file SystemControllers.cs. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. The summary by CVE is:

Ombi is an open source application which allows users to request specific media from popular self-hosted streaming servers. Versions prior to 4.38.2 contain an arbitrary file read vulnerability where an Ombi administrative user may access files available to the Ombi server process on the host operating system. Ombi administrators may not always be local system administrators and so this may violate the security expectations of the system. The arbitrary file read vulnerability was present in `ReadLogFile` and `Download` endpoints in `SystemControllers.cs` as the parameter `logFileName` is not sanitized before being combined with the `Logs` directory. When using `Path.Combine(arg1, arg2, arg3)`, an attacker may be able to escape to folders/files outside of `Path.Combine(arg1, arg2)` by using ".." in `arg3`. In addition, by specifying an absolute path for `arg3`, `Path.Combine` will completely ignore the first two arguments and just return just `arg3`. This vulnerability can lead to information disclosure. The Ombi `documentation` suggests running Ombi as a Service with Administrator privileges. An attacker targeting such an application may be able to read the files of any Windows user on the host machine and certain system files. This issue has been addressed in commit `b8a8f029` and in release version 4.38.2. Users are advised to upgrade. There are no known workarounds for this vulnerability. This issue is also tracked as GHSL-2023-088.

The weakness was disclosed 05/18/2023 as GHSA-28j3-84m7-gpjp. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2023-32322 since 05/08/2023. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 4.38.2 eliminates this vulnerability. Applying the patch b8a8f029d80454d582bc4a2a05175106809335d0 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

• Ombi

Version

• 4.38.0
• 4.38.1

License

• open-source

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• 🔍

CPE 2.2info

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• 🔍

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

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