Rapid7 Vulnerability & Exploit Database

Centos Linux: CVE-2021-20230: Important: stunnel security update (CESA-2021:0618)

Back to Search

Centos Linux: CVE-2021-20230: Important: stunnel security update (CESA-2021:0618)

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
02/22/2021
Created
02/24/2021
Added
02/23/2021
Modified
03/03/2021

Description

A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.

Solution(s)

  • centos-upgrade-stunnel
  • centos-upgrade-stunnel-debuginfo
  • centos-upgrade-stunnel-debugsource

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;