CVE-2022-35861

Advisory

Pyenv 1.2.24 throughout 2.3.2 allows local users to gain privileges via a .python-version file in the current working directory. An attacker can craft a Python version string in .python-version to execute shims under their control. Shims are executables that pass a command along to a specific version of pyenv. The version string is used to construct the path to the command, and there is no validation of whether the version specified is a valid version. Thus, relative path traversal can occur.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

pyenv 1.2.24 through 2.3.2 allows local users to gain privileges via a .python-version file in the current working directory. An attacker can craft a Python version string in .python-version to execute shims under their control. (Shims are executables that pass a command along to a specific version of pyenv. The version string is used to construct the path to the command, and there is no validation of whether the version specified is a valid version. Thus, relative path traversal can occur.) See CVE-2022-35861.


MISC:https://github.com/pyenv/pyenv/commit/22fa683571d98b59ea16e5fe48ac411c67939653: https://github.com/pyenv/pyenv/commit/22fa683571d98b59ea16e5fe48ac411c67939653

Resources

• https://github.com/pyenv/pyenv/commit/22fa683571d98b59ea16e5fe48ac411c67939653
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-35861