CVE-2021-28363
CVE-2021-28363
This page contains facts from public vulnerability sources. Check the original advisory before updating.
The urllib3 library 1.26.x before 1.26.4 for Python omits SSL certificate validation in some cases involving HTTPS to HTTPS proxies. The initial connection to the HTTPS proxy (if an SSLContext isn't given via proxy_config) doesn't verify the hostname of the certificate. This means certificates for different servers that still validate properly with the default urllib3 SSLContext will be silently accepted.
CVSS 6.5 · Medium · EPSS 2.2% · Fix available
- Published
- Updated
Affected products and versions
n/a
- Versions
- n/a: Affected
No fix published
python-urllib3 Debian:12
- Affected ranges
- ECOSYSTEM: < 1.26.4-1
Update to 1.26.4-1
python-urllib3 Debian:13
- Affected ranges
- ECOSYSTEM: < 1.26.4-1
Update to 1.26.4-1
python-urllib3 Debian:14
- Affected ranges
- ECOSYSTEM: < 1.26.4-1
Update to 1.26.4-1
urllib3 PyPI
- Versions
- 1.26.0
- 1.26.1
- 1.26.2
- 1.26.3
- Affected ranges
- ECOSYSTEM: ≥ 1.26.0, < 1.26.4
Update to 1.26.4
urllib3 PyPI
- Versions
- 1.26.0
- 1.26.1
- 1.26.2
- 1.26.3
- Affected ranges
- GIT: < 8d65ea1ecf6e2cdc27d42124e587c1b83a3118b0
- ECOSYSTEM: ≥ 1.26.0, < 1.26.4
Update to 1.26.4
Original sources
- https://github.com/urllib3/urllib3/commits/main
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXL/
- https://security.gentoo.org/glsa/202107-36
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://pypi.org/project/urllib3/1.26.4/
- https://github.com/urllib3/urllib3/commit/8d65ea1ecf6e2cdc27d42124e587c1b83a3118b0
- https://github.com/urllib3/urllib3/security/advisories/GHSA-5phf-pp7p-vc2r
- https://security.gentoo.org/glsa/202305-02
- https://security.netapp.com/advisory/ntap-20240621-0007/
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://nvd.nist.gov/vuln/detail/CVE-2021-28363