Zed Extension Sandbox Escape via Tar Symlink Following
Summary
Zed Extension Sandbox Escape via Tar Symlink Following
Original description
The description as published by the source.
Zed, a code editor, has an extension installer allows tar/gzip downloads. Prior to version 0.224.4, the tar extractor (async_tar::Archive::unpack) creates symlinks from the archive without validation, and the path guard (writeable_path_from_extension) only performs lexical prefix checks without resolving symlinks. An attacker can ship a tar that first creates a symlink inside the extension workdir pointing outside (e.g., escape -> /), then writes files through the symlink, causing writes to arbitrary host paths. This escapes the extension sandbox and enables code execution. Version 0.224.4 patches the issue.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov