Microsoft Windows Kernel – ‘HmgAllocateObjectAttr’ Use-After-Free (MS15-061)
Source: https://code.google.com/p/google-security-research/issues/detail?id=320 The PoC bug checks reliably with Special Pool enabled on writing to freed memory. A reference to the freed memory is held at offset +0x10 of the THREADINFO object. This memory is referenced in HmgAllocateObjectAttr which is called in multiple locations. The freed memory is a struct inside a Brush Object which is freed in the call NtGdiDeleteObjectApp. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/38269.zip |