TippingPoint Zero Day Initiative

Samba sec_io_acl Heap Overflow Vulnerability

ZDI-07-032: July 11th, 2007

CVE ID

Affected Vendors

    Samba

Affected Products

    3.0.x

Vulnerability Details

This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Samba. User interaction is not required to exploit this vulnerability.

The specific flaw exists in the parsing of RPC requests to the SRVSVC RPC interface. When parsing a request to NetSetFileSecurity, heap allocation is calculated based on user input. By specifying invalid values, heap blocks can be overwritten leading to remote code execution.

Vendor Response

Samba has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2007-04-25 - Vulnerability reported to vendor
    2007-07-11 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Anonymous