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Samba SetInformationPolicy AuditEventsInfo Heap Overflow

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Samba SetInformationPolicy AuditEventsInfo Heap Overflow



This module triggers a vulnerability in the LSA RPC service of the Samba daemon because of an error on the PIDL auto-generated code. Making a specially crafted call to SetInformationPolicy to set a PolicyAuditEventsInformation allows to trigger a heap overflow and finally execute arbitrary code with root privileges. The module uses brute force to guess the stackpivot/rop chain or the system() address and redirect flow there in order to bypass NX. The start and stop addresses for brute forcing have been calculated empirically. On the other hand the module provides the StartBrute and StopBrute which allow the user to configure his own addresses.


  • Unknown
  • blasty
  • mephos
  • sinn3r <sinn3r@metasploit.com>
  • juan vazquez <juan.vazquez@metasploit.com>




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 exploit/linux/samba/setinfopolicy_heap
msf exploit(setinfopolicy_heap) > show targets
msf exploit(setinfopolicy_heap) > set TARGET < target-id >
msf exploit(setinfopolicy_heap) > show options
    ...show and set options...
msf exploit(setinfopolicy_heap) > exploit

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