CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
EPSS
Percentile
76.0%
Irssi before 0.8.15, when SSL is used, does not verify that the server
hostname matches a domain name in the subject’s Common Name (CN) field or a
Subject Alternative Name field of the X.509 certificate, which allows
man-in-the-middle attackers to spoof IRC servers via an arbitrary
certificate.