- Description
- Nix is a package manager for Linux and other Unix systems. Prior to 2.35.0, a malicious derivation executed with the recursive-nix experimental feature can exploit a time-of-check/time-of-use race involving final symlink handling in the LocalStore restore path. The race can cause writeFile to follow a substituted final symlink when opening a path with O_TRUNC instead of enforcing FinalSymlink::DontFollow, allowing the Nix process or nix-daemon to create or truncate an empty file outside the build sandbox with the daemon user's permissions. The primitive does not provide arbitrary-content writes and requires winning the race. This issue is fixed in version 2.35.0.
- Source
- security-advisories@github.com
- NVD status
- Received
CVSS 3.1
- Type
- Secondary
- Base score
- 2.8
- Impact score
- 1.4
- Exploitability score
- 1.1
- Vector string
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N
- Severity
- LOW
- security-advisories@github.com
- CWE-61
- Hype score
- Not currently trending