SB2020090420 - Path traversal in Python PIP installation package
Published: September 4, 2020 Updated: November 23, 2020
Security Bulletin ID
SB2020090420
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Path traversal (CVE-ID: CVE-2019-20916)
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences passed via URL to the install command within the _download_http_url() function in _internal/download.py. A remote attacker can send a specially crafted HTTP request with the Content-Disposition header that contains directory traversal characters in the filename and overwrite the /root/.ssh/authorized_keys file.
Remediation
Install update from vendor's website.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00010.html
- https://github.com/gzpan123/pip/commit/a4c735b14a62f9cb864533808ac63936704f2ace
- https://github.com/pypa/pip/compare/19.1.1...19.2
- https://github.com/pypa/pip/issues/6413
- https://lists.debian.org/debian-lts-announce/2020/09/msg00010.html