A vulnerability was found in pip Package up to 19.1 on Python. It has been rated as critical. This issue affects the function _download_http_url of the file _internal/download.py. The manipulation with the input value ../ leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The pip package before 19.2 for Python allows Directory Traversal when a URL is given in an install command, because a Content-Disposition header can have ../ in a filename, as demonstrated by overwriting the /root/.ssh/authorized_keys file. This occurs in _download_http_url in _internal/download.py.

The weakness was disclosed 09/04/2020. The identification of this vulnerability is CVE-2019-20916 since 09/04/2020. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 19.2 eliminates this vulnerability.

The entries VDB-204268 and VDB-226531 are pretty similar.

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• pip Package

Version

• 19.0
• 19.1

CPE 2.3info

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• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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