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 isnt given via proxy_config) doesnt 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.

Risk Information

Base Score

6.5

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Score

Exploitation Probability

0.107

Associated Vulnerability

Vulnerability	OS Platform
Multiple Vulnerabilities are affected in IBM Cognos Analytics 11.2.4	Windows
Multiple vulnerabilities are affected in Oracle PeopleSoft Enterprise PeopleTools 8.59	Windows
Multiple Vulnerabilities are affected in IBM Cognos Analytics 12.0.2	Windows
Vulnerabilities CVE-2021-28363 are fixed in Python-urllib3 1.26.4	Windows
Vulnerabilities CVE-2021-28363 are fixed in Python-urllib3 for linux 1.26.4	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234