CVE-2021-28363
Public on 2021-03-15
Modified on 2021-06-22
Description
A flaw was found in python-urllib3. SSL certificate validation is omitted 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.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | python-pip | 2021-06-16 | ALAS2-2021-1667 | Fixed |
| Amazon Linux 2 - Core | python-pip | 2022-01-18 | ALAS2-2022-1742 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVD | CVSSv3 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVD | CVSSv2 | 6.4 | AV:N/AC:L/Au:N/C:P/I:P/A:N |