Information disclosure in Python

1) Cleartext transmission of sensitive information

EUVDB-ID: #VU80228

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-40217

CWE-ID: CWE-319 - Cleartext Transmission of Sensitive Information

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to an error in ssl.SSLSocket implementation when handling TLS client authentication. A remote attacker can trick the application to send data unencrypted.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Python: 3.8.0 - 3.11.4

CPE2.3

• cpe:2.3:a:python_org:python:3.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:*:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.8.2:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.8.3:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.8.4:rc1:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.8.5:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.8.6:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.8.7:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.8.8:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.8.9:*:*:*:*:*:*:*

External links

https://mail.python.org/archives/list/security-announce@python.org/thread/PEPLII27KYHLF4AK3ZQGKYNCRERG4YXY/
https://docs.python.org/3.11/whatsnew/changelog.html#python-3-11-5-final

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.