The msasl module in InspIRCd before 2.0.23, when used with a service that supports SASLEXTERNAL authentication, allows remote attackers to spoof certificate fingerprints and consequently log in as another user via a crafted SASL message.
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "2.0.20-5ubuntu0.1~esm1", "binary_name": "inspircd" }, { "binary_version": "2.0.20-5ubuntu0.1~esm1", "binary_name": "inspircd-dbg" }, { "binary_version": "2.0.20-5ubuntu0.1~esm1", "binary_name": "inspircd-dbgsym" }, { "binary_version": "2.0.20-5ubuntu0.1~esm1", "binary_name": "inspircd-dev" }, { "binary_version": "2.0.20-5ubuntu0.1~esm1", "binary_name": "inspircd-dev-dbgsym" } ] }