Vulnerability identifier: #VU67591

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-28861

CWE-ID: CWE-601

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Python
Universal components / Libraries / Scripting languages

Vendor: Python.org

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data in lib/http/server.py due to missing protection against multiple (/) at the beginning of URI path. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Python: 3.0 - 3.10.5

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CPE

• cpe:2.3:a:python_org:python:3.10.5:*:*:*:*:*:*:*

External links
http://github.com/python/cpython/pull/93879
http://bugs.python.org/issue43223
http://github.com/python/cpython/pull/24848
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OKYE2DOI2X7WZXAWTQJZAXYIWM37HDCY/

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?