Stunnel: >> Stunnel >> 5.04 Security Vulnerabilities
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.
CVSS Score
7.5
EPSS Score
0.002
Published
2021-02-23
Stunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, which allows remote attackers to bypass authentication.
CVSS Score
5.8
EPSS Score
0.002
Published
2015-05-14