Security vulnerabilities and automated fixes for windows security issues
3 posts found
A critical buffer overflow vulnerability was discovered in `phlib/nativefile.c`, where multiple `memcpy` calls copied filename and extended-attribute data into fixed-size structures without verifying that source lengths didn't exceed destination buffer boundaries. An attacker supplying an oversized filename or EA name could corrupt adjacent heap memory, potentially enabling arbitrary code execution. The fix replaces unchecked arithmetic with Windows' safe integer helpers (`RtlULongAdd`, `RtlULon
A medium-severity vulnerability in Sandboxie's kernel-level input hook allowed malicious sandboxed processes to inject keystrokes and mouse clicks into privileged windows outside the sandbox, including UAC dialogs. The fix adds proper window handle validation to ensure INPUT structures only target windows within the same sandbox boundary. This is a critical reminder that sandbox isolation must be enforced at every layer, especially at the kernel level where input events are processed.
A critical memory safety vulnerability was discovered and patched in a Windows clipboard handler written in C, where heap-allocated memory was freed twice without nullifying the pointer, enabling potential remote code execution through crafted clipboard data. This type of double-free vulnerability represents one of the most dangerous classes of memory corruption bugs, capable of being weaponized by attackers to hijack program execution. The fix eliminates the unsafe memory management pattern, cl