The remote host is vulnerable to a buffer overflow.
The remote host is running an older version of Quicktime player for Microsoft Windows. This version is vulnerable to a remote overflow. A remote attacker exploiting this flaw would need to create a malicious Quicktime file and entice the user to play it. A successful exploit would allow the attacker to execute random code within the context of the local machine. Additionally, there is a similar flaw within the Quicktime library that displays JPEG files. An attacker exploiting this second flaw would need to be able to convince a user into viewing a malicious JPEG file within the Quicktime viewer. Successful exploitation would result in arbitrary code being executed on the victim system.
Upgrade or patch according to vendor recommendations.