#VU50843 Improper Certificate Validation in Stunnel - CVE-2021-20230

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Main Vulnerability Database Vulnerabilities #VU50843

#VU50843 Improper Certificate Validation in Stunnel - CVE-2021-20230

Published: February 22, 2021


Vulnerability identifier: #VU50843
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-20230
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Stunnel
Software vendor:
Stunnel.org

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to improper client certificate validation, when redirect and verifyChain options are used. A remote attacker can bypass implemented security restrictions with a any valid certificated and gain access to sensitive information.


Remediation

Install updates from vendor's website.

External links