Privilege escalation in Microsoft Windows

1) Privilege escalation

EUVDB-ID: #VU4901

Risk: High

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2014-6324

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: Yes

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: Vista - 8.1

Windows Server: 2003 - 2012

CPE2.3

• cpe:2.3:o:microsoft:windows:Vista:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:8.1:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:*

External links

https://technet.microsoft.com/en-us/library/security/MS14-068

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.