Insecure DLL loading in CPython

1) Insecure DLL loading

EUVDB-ID: #VU24843

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8315

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to direct calls to "LoadLibraryW()" in "getpathp.c" without any "LOAD_LIBRARY_SEARCH*" flags. A remote attacker can use a malicious copy of api-ms-win-core-path-l1-1-0.dll, which being loaded and used instead of the system's copy and execute arbitrary code on victim's system.

Mitigation

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

Vulnerable software versions

CPython: 3.6.0 - 3.8.1

External links

http://bugs.python.org/issue39401

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.