#VU85695 Cryptographic issues in python-ecdsa - CVE-2024-23342

Vulnerability identifier: #VU85695

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-23342

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
python-ecdsa
Universal components / Libraries / Software for developers

Vendor: Brian Warner

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to a side-channel attack on P-256. A remote attacker can launch Minerva attack and gain access to sensitive information.

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

Vulnerable software versions

python-ecdsa: 0.5 - 0.18.0

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External links
https://github.com/tlsfuzzer/python-ecdsa/security/advisories/GHSA-wj6h-64fc-37mp
https://github.com/tlsfuzzer/python-ecdsa/blob/master/SECURITY.md
https://minerva.crocs.fi.muni.cz/
https://securitypitfalls.wordpress.com/2018/08/03/constant-time-compare-in-python/

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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.