-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ZDI-12-094 : RealNetworks Helix Server rn5auth Credential Parsing Remote Code Execution Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-12-094 June 21, 2012 - -- CVE ID: CVE-2012-0942 - -- CVSS: 7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P - -- Affected Vendors: RealNetworks - -- Affected Products: RealNetworks Helix Server - -- TippingPoint(TM) IPS Customer Protection: TippingPoint IPS customers have been protected against this vulnerability by Digital Vaccine protection filter ID 12401. For further product information on the TippingPoint IPS, visit: 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. - -- Vendor Response: 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: This vulnerability was discovered by: * Anonymous - -- About the Zero Day Initiative (ZDI): Established by TippingPoint, The Zero Day Initiative (ZDI) represents a best-of-breed model for rewarding security researchers for responsibly disclosing discovered vulnerabilities. Researchers interested in getting paid for their security research through the ZDI can find more information and sign-up at: http://www.zerodayinitiative.com The ZDI is unique in how the acquired vulnerability information is used. TippingPoint does not re-sell the vulnerability details or any exploit code. Instead, upon notifying the affected product vendor, TippingPoint provides its customers with zero day protection through its intrusion prevention technology. Explicit details regarding the specifics of the vulnerability are not exposed to any parties until an official vendor patch is publicly available. Furthermore, with the altruistic aim of helping to secure a broader user base, TippingPoint provides this vulnerability information confidentially to security vendors (including competitors) who have a vulnerability protection or mitigation product. Our vulnerability disclosure policy is available online at: http://www.zerodayinitiative.com/advisories/disclosure_policy/ Follow the ZDI on Twitter: http://twitter.com/thezdi -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 10.2.0 (Build 1950) Charset: utf-8 wsBVAwUBT+OKbVVtgMGTo1scAQIrSAf/YexCI59Mz1r+ladyJOrHqX8qnLiIE9bS rBcGARpRNRJD8YTHDnACbh8cQhwPWYiXJn5wYIMa+UdqHNflrVZgH28bMOuXy+5X Os27QeAP5fL0XEScWkeAKmxYvBtNRq3IAtOIL9G/R31rFh1Y339SeSYjRGymAgLh b0foDSAbazrXgAXTZjO0DFtkotzy6DV8+p8Lwz/TTdL6JXwOIpp6tm7u2+kx6SoO 0b8MhN2cB0Jb/cTYqgZC2Z2mvT8GQSbO6h7K29zkHKSnIcyAVLpgyOFM1qXAOUOr ae/eWET955DKQzxqZuNehmA9mgicjYpETbAXIVR0H6NnVRsGEGK3bQ== =TkGX -----END PGP SIGNATURE-----