Denial of service in python-py

1) Incorrect Regular Expression

EUVDB-ID: #VU71642

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2022-42969

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation in Subversion repository caused by a mishandled InfoSvnCommand argument. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

python-py: 1.0.0 - 1.11.0

External links

http://github.com/pytest-dev/py/blob/cb87a83960523a2367d0f19226a73aed4ce4291d/py/_path/svnurl.py#L316
http://github.com/pytest-dev/py/issues/287
http://github.com/advisories/GHSA-w596-4wvx-j9j6

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.