#VU50744 Cryptographic issues in OpenSSL - CVE-2021-23839

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Main Vulnerability Database Vulnerabilities #VU50744

#VU50744 Cryptographic issues in OpenSSL - CVE-2021-23839

Published: February 17, 2021 / Updated: October 2, 2024


Vulnerability identifier: #VU50744
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-23839
CWE-ID: CWE-310
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
OpenSSL
Software vendor:
OpenSSL Software Foundation

Description

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

The vulnerability exists due to a faulty implementation of the padding check when server is configured to support SSLv2 protocol. A remote attacker can perform a MitM attack and force the server to use less secure protocols.


Remediation

Install updates from vendor's website.

External links