An exploit writer at Core Security Technologies has discovered a serious vulnerability that exposes users of Microsoft’s Virtual PC virtualization software to malicious hacker attacks.The vulnerability, which is unpatched, essentially allows an attacker to bypass several major security mitigations —  Data Execution Prevention (DEP), Safe Exception Handlers (SafeSEH) and Address Space Layout Randomization (ASLR) — to exploit the Windows operating system.

Research between North Carolina State and Microsoft has garnered a way to better isolate and centralize kernels–up to 6,000 different kernel hooks–and has stopped nine rootkits. The tool is called HookSafe and runs on Ubuntu Linux 8.04 and uses hardware-based memory. At issue is whether other rootkit technology can bypass this tool, says one rootkit expert. The one hitch so far appears to be a 6 percent performance hit.  Read the full article. [Dark Reading]

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