RealNetworks Realplayer QCP Parsing Remote Code Execution VulnerabilityZDI-11-265: August 16th, 2011
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11229. For further product information on the TippingPoint IPS:
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of RealNetworks RealPlayer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within qcpfformat.dll, which is responsible for parsing QCP media files. The process creates a static 256 byte allocation on the heap and trusts a user-supplied counter from the file within a memory copy loop. As the source data is also user-supplied from the file, this can be abused by a remote attacker to execute arbitrary code running in the context of the web browser.
Vendor ResponseRealNetworks has issued an update to correct this vulnerability. More details can be found at:
2011-04-01 - Vulnerability reported to vendor
2011-08-16 - Coordinated public release of advisory
CreditThis vulnerability was discovered by:
Sean de Regge