Rapid7 VulnDB

MS14-068 Microsoft Kerberos Checksum Validation Vulnerability

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MS14-068 Microsoft Kerberos Checksum Validation Vulnerability

Disclosed
11/18/2014
Created
05/30/2018

Description

This module exploits a vulnerability in the Microsoft Kerberos implementation. The problem exists in the verification of the Privilege Attribute Certificate (PAC) from a Kerberos TGS request, where a domain user may forge a PAC with arbitrary privileges, including Domain Administrator. This module requests a TGT ticket with a forged PAC and exports it to a MIT Kerberos Credential Cache file. It can be loaded on Windows systems with the Mimikatz help. It has been tested successfully on Windows 2008.

Author(s)

  • Tom Maddock
  • Sylvain Monne
  • juan vazquez <juan.vazquez@metasploit.com>

Development

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use auxiliary/admin/kerberos/ms14_068_kerberos_checksum
msf auxiliary(ms14_068_kerberos_checksum) > show actions
    ...actions...
msf auxiliary(ms14_068_kerberos_checksum) > set ACTION < action-name >
msf auxiliary(ms14_068_kerberos_checksum) > show options
    ...show and set options...
msf auxiliary(ms14_068_kerberos_checksum) > run 

Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.

– Jim O’Gorman | President, Offensive Security

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