Exploited by Duqu.
The vulnerability was reported by Qualcomm Information Security & Risk Management team.
Vulnerable component: Windows
CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CWE-ID: CWE-310 - Cryptographic Issues
The vulnerability allows a remote authenticated attacker to obtain elevated privileges on the target system.
The weakness exists due to the failure to properly validate signatures in the Kerberos ticket by the Microsoft Kerberos KDC implementation. A remote attacker can forge a ticket and elevate an unprivileged domain user account to a domain administrator account.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.
Note: the vulnerability was being actively exploited.