Vulnerability Monitor

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CVE-2021-28363

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.

Published

2021-03-15T18:15:19.017

Last Modified

2024-11-21T05:59:35.823

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

4.9

Weaknesses

Type: Primary
CWE-295

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	python	urllib3	< 1.26.4	Yes
Operating System	fedoraproject	fedora	34	Yes
Application	oracle	peoplesoft_enterprise_peopletools	8.59	Yes

References

https://github.com/urllib3/urllib3/commit/8d65ea1ecf6e2cdc27d42124e587c1b83a3118b0 Patch, Third Party Advisory ([email protected])
https://github.com/urllib3/urllib3/commits/main Patch, Third Party Advisory ([email protected])
https://github.com/urllib3/urllib3/security/advisories/GHSA-5phf-pp7p-vc2r Mitigation, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXL/ ([email protected])
https://pypi.org/project/urllib3/1.26.4/ Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202107-36 Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202305-02 ([email protected])
https://security.netapp.com/advisory/ntap-20240621-0007/ ([email protected])
https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory ([email protected])
https://github.com/urllib3/urllib3/commit/8d65ea1ecf6e2cdc27d42124e587c1b83a3118b0 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/urllib3/urllib3/commits/main Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/urllib3/urllib3/security/advisories/GHSA-5phf-pp7p-vc2r Mitigation, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXL/ (af854a3a-2127-422b-91ae-364da2661108)
https://pypi.org/project/urllib3/1.26.4/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202107-36 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202305-02 (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20240621-0007/ (af854a3a-2127-422b-91ae-364da2661108)
https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)