This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.
This signature detects an attempt to exploit a buffer overflow vulnerability in GDI+ may result in remote code execution.
A remote code execution vulnerability exists in the way that GDI+ handles gradient sizes. The vulnerability could allow remote code execution if a user opens a specially crafted image file. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts.
To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2007-5348.
Download and install all vendor patches related to this vulnerability.