RubySec

Providing security resources for the Ruby community

CVE-2020-13163 (em-imap): Improper certificate validation in em-imap

ADVISORIES

GEM

em-imap

SEVERITY

CVSS v3: 7.4 (High)

PATCHED VERSIONS

None.

DESCRIPTION

em-imap 0.5 and earlier use the library eventmachine in an insecure way that allows an attacker to perform a man-in-the-middle attack against users of the library. The hostname in a TLS server certificate is not verified.