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RUSTSEC-2025-0139

theshit vulnerable to unsafe loading of user-owned Python rules when running as root

Reported
Issued
Package
theshit (crates.io)
Type
Vulnerability
Categories
Keywords
#pyo3 #lpe
Aliases
References
CVSS Score
7.3 HIGH
CVSS Details
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality Impact
High
Integrity Impact
High
Availability Impact
High
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Patched
  • >=0.1.1
Affected Functions
Version
theshit::fix::python::process_python_rules
  • <0.1.1

Description

The application loads custom Python rules and configuration files from user-writable locations (e.g., ~/.config/theshit/) without validating ownership or permissions when executed with elevated privileges.

If the tool is invoked with sudo or otherwise runs with an effective UID of root, it continues to trust configuration files originating from the unprivileged user's environment. This allows a local attacker to inject arbitrary Python code via a malicious rule or configuration file, which is then executed with root privileges.

The patch introduces strict ownership and permission checks for all configuration files and custom rules. The application now enforces that rules are only loaded if they are owned by the effective user executing the tool.

When executed with elevated privileges (EUID=0), the application refuses to load any files that are not owned by root or that are writable by non-root users. When executed as a non-root user, it similarly refuses to load rules owned by other users. This prevents both vertical and horizontal privilege escalation via execution of untrusted code.

Advisory available under CC-BY-4.0 license. Source: https://github.com/advisories/GHSA-95qg-89c2-w5hj