Eugeny tabby up to 1.0.215 Environment Variable DYLD_INSERT_LIBRARIES default permission

Summaryinfo

A vulnerability categorized as critical has been discovered in Eugeny tabby up to 1.0.215. Impacted is an unknown function of the component Environment Variable Handler. Executing a manipulation of the argument DYLD_INSERT_LIBRARIES can lead to default permission. This vulnerability is registered as CVE-2024-55950. The attack needs to be launched locally. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Eugeny tabby up to 1.0.215. This vulnerability affects an unknown functionality of the component Environment Variable Handler. The manipulation of the argument DYLD_INSERT_LIBRARIES with an unknown input leads to a default permission vulnerability. The CWE definition for the vulnerability is CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Tabby (formerly Terminus) is a highly configurable terminal emulator. Prior to 1.0.216, Tabby terminal emulator contains overly permissive entitlements that are unnecessary for its core functionality and plugin system, creating potential security vulnerabilities. The application currently holds powerful permissions including camera, microphone access, and the ability to access personal folders (Downloads, Documents, etc.) through Apple Events, while also maintaining dangerous entitlements that enable code injection. The concerning entitlements are com.apple.security.cs.allow-dyld-environment-variables and com.apple.security.cs.disable-library-validation. Since Tabby's plugins and themes are NodeJS-based without native libraries or frameworks, and no environment variables are used in the codebase, it is recommended to review and remove at least one of the entitlements (com.apple.security.cs.disable-library-validation or com.apple.security.cs.allow-dyld-environment-variables) to prevent DYLD_INSERT_LIBRARIES injection while maintaining full application functionality. This vulnerability is fixed in 1.0.216.

The advisory is shared for download at github.com. This vulnerability was named CVE-2024-55950 since 12/13/2024. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1222.

Upgrading to version 1.0.216 eliminates this vulnerability. Applying the patch e1e6e1cdab0310a881e36afd7c2744e5f905518b 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

Vendor

• Eugeny

Name

• tabby

Version

• 1.0.215

License

• open-source

Website

• Product: https://github.com/Eugeny/tabby/

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