Security vulnerabilities and automated fixes for libretro issues
3 posts found
A critical heap buffer overflow vulnerability was discovered in `libretro-db/rmsgpack_dom.c`, where a missing integer width cast allowed an attacker-controlled string length value of `UINT32_MAX` to wrap around to zero, completely collapsing the bounds check before a `memcpy` call. The fix is a single targeted cast to `uint64_t` that closes the overflow window and ensures the bounds check behaves correctly regardless of the input value. This class of vulnerability is a textbook example of how in
A critical out-of-bounds memory read vulnerability was discovered and patched in libretro-common's network socket abstraction layer, where unsafe memcpy operations on caller-supplied fd_set pointers could lead to heap or stack memory corruption. Attackers or malicious inputs exploiting this flaw could potentially read sensitive memory regions or destabilize the application. The fix introduces proper source-size validation before performing memory copy operations on file descriptor sets.
A critical buffer overflow vulnerability was discovered and patched in `libretro_core_options.h`, where unsafe string operations (`strcpy()` and `strcat()`) could allow attackers to corrupt memory and achieve arbitrary code execution. The fix eliminates these dangerous C string functions in favor of bounds-checked alternatives, closing a path that could be exploited through maliciously crafted core option configurations. Understanding this class of vulnerability is essential for any developer wo