Advisory Details

June 21st, 2012

RealNetworks Helix Server rn5auth Credential Parsing Remote Code Execution Vulnerability

ZDI-12-094
ZDI-CAN-1428

CVE ID CVE-2012-0942
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS RealNetworks
AFFECTED PRODUCTS Helix Server
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 12401. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Real Helix Server. Authentication is not required to exploit this vulnerability.

The specific flaw exists within rn4auth.dll, which is responsible for parsing authentication credentials. When the GetNameValuePair() function calls strcpy, there is an unbounded copy into a stack buffer, which can lead to stack memory corruption. An attacker can leverage this vulnerability to execute code under the context of the process.

ADDITIONAL DETAILS RealNetworks has issued an update to correct this vulnerability. More details can be found at:
http://helixproducts.real.com/docs/security/SecurityUpdate04022012HS.pdf
DISCLOSURE TIMELINE
  • 2011-11-04 - Vulnerability reported to vendor
  • 2012-06-21 - Coordinated public release of advisory
CREDIT Anonymous
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