Samba GetAliasMembership SidArray Remote Code Execution VulnerabilityZDI-12-068: April 18th, 2012
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This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Samba. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the way Samba handles GetAliasMembership requests. When parsing the data send in the request Samba uses the field 'sids' to create a heap allocation but then uses another field, 'num_sids', to write data to the allocation. Because there is no check to see if 'num_sids' is smaller than 'sids' this could result in a heap buffer overflow that could lead to remote code execution.
Vendor ResponseSamba has issued an update to correct this vulnerability. More details can be found at:
2012-03-14 - Vulnerability reported to vendor
2012-04-18 - Coordinated public release of advisory
CreditThis vulnerability was discovered by: