#VU59164 Use of insufficiently random values in wolfSSL

Vulnerability identifier: #VU59164

Vulnerability risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: N/A

CWE-ID: CWE-330

Exploitation vector: Network

Exploit availability: No

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

Vendor: wolfSSL

Description

The vulnerability allows a remote attacker to decrypt TLS session.

The vulnerability exists in wolfSSL implementation when using AES-CBC or DES3 with TLS/DTLS 1.2 or 1.1. The initialization vector used is not random, which may allow an attacker to decrypt the TLS session or perform MitM attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

wolfSSL: 5.0.0 - 5.1.0

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External links
https://github.com/wolfSSL/wolfssl/releases/tag/v5.1.1-stable

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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.