Vulnerability identifier: #VU91832

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-37568

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
authlib
Universal components / Libraries / Libraries used by multiple products

Vendor: lepture (Hsiaoming Yang)

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

authlib: 0.1 - 1.3.0

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External links
http://github.com/lepture/authlib/issues/654

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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.