Vulnerability in the Java SE, Java SE Embedded component of Oracle Java SE
(subcomponent: Libraries). Supported versions that are affected are Java
SE: 6u161, 7u151, 8u144 and 9; Java SE Embedded: 8u144. Difficult to
exploit vulnerability allows unauthenticated attacker with network access
via Kerberos to compromise Java SE, Java SE Embedded. Successful attacks
require human interaction from a person other than the attacker. Successful
attacks of this vulnerability can result in takeover of Java SE, Java SE
Embedded. Note: Applies to the Java SE Kerberos client. CVSS 3.0 Base Score
7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector:
(CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).

Jeffrey Altman discovered that the Kerberos client implementation in
OpenJDK incorrectly trusted unauthenticated portions of Kerberos
tickets. A remote attacker could use this to impersonate trusted
network services or perform other attacks.