MitM attack in wolfSSL

Published: 2020-08-26
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-24613
Exploitation vector Network
Public exploit N/A
Vulnerable software
Universal components / Libraries / Libraries used by multiple products

Vendor wolfSSL

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Cryptographic issues

EUVDB-ID: #VU46079

Risk: Medium


CVE-ID: CVE-2020-24613

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No


The vulnerability allows a remote attacker to perform a MitM attack.

The vulnerability exists due to incorrect implementation of TLS 1.3 protocol within the SanityCheckTls13MsgReceived() in tls13.c when processing server data in the WAIT_CERT_CR state. A remote attacker can perform a Man-in-the-Middle (MitM) attack and read or modify information passed between clients using the wolfSSL library and TLS servers.


Install updates from vendor's website.

Vulnerable software versions

wolfSSL: 4.0 - 4.4.0

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?