Moderate severityNVD Advisory· Published Mar 15, 2021· Updated Aug 3, 2024
CVE-2021-28363
CVE-2021-28363
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
urllib3PyPI | >= 1.26.0, < 1.26.4 | 1.26.4 |
Affected products
2- Python/urllib3description
Patches
Vulnerability mechanics
References
19- github.com/advisories/GHSA-5phf-pp7p-vc2rghsaADVISORY
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXL/mitrevendor-advisory
- nvd.nist.gov/vuln/detail/CVE-2021-28363ghsaADVISORY
- security.gentoo.org/glsa/202107-36ghsavendor-advisoryWEB
- security.gentoo.org/glsa/202305-02ghsavendor-advisoryWEB
- github.com/pypa/advisory-database/tree/main/vulns/urllib3/PYSEC-2021-59.yamlghsaWEB
- github.com/pypa/advisory-db/tree/main/vulns/urllib3/PYSEC-2021-59.yamlghsaWEB
- github.com/urllib3/urllib3/blob/main/CHANGES.rstghsaWEB
- github.com/urllib3/urllib3/commit/8d65ea1ecf6e2cdc27d42124e587c1b83a3118b0ghsaWEB
- github.com/urllib3/urllib3/commits/mainghsaWEB
- github.com/urllib3/urllib3/releases/tag/1.26.4ghsaWEB
- github.com/urllib3/urllib3/security/advisories/GHSA-5phf-pp7p-vc2rghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXLghsaWEB
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXLghsaWEB
- pypi.org/project/urllib3/1.26.4ghsaWEB
- security.netapp.com/advisory/ntap-20240621-0007ghsaWEB
- www.oracle.com/security-alerts/cpuoct2021.htmlghsaWEB
- pypi.org/project/urllib3/1.26.4/mitre
- security.netapp.com/advisory/ntap-20240621-0007/mitre
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