Security vulnerabilities and automated fixes for stack smashing issues
10 posts found
A critical stack buffer overflow vulnerability was discovered in the ARM Hardware Abstraction Layer (HAL) initialization code, where an unchecked `vsprintf()` call could allow an attacker to overwrite the stack frame and achieve arbitrary code execution at the kernel level (ring-0). The fix replaces `vsprintf()` with `vsnprintf()` — a single-character change with enormous security implications. Left unpatched, this vulnerability could have allowed malicious hardware enumeration data or boot-time
A critical stack buffer overflow vulnerability was discovered in `ftm_file.cpp`, where unchecked `strcpy()` calls allowed attacker-controlled filenames from crafted FTM files to overwrite stack memory, including the saved return address, enabling arbitrary code execution on ESP32 devices. The fix replaces both dangerous `strcpy()` calls with bounds-checked `strncpy()` plus explicit null-termination, eliminating the overflow vector entirely. This is a textbook reminder that unsafe C string functi
A critical buffer overflow vulnerability was discovered and patched in `universe/command.c`, where four unbounded `sprintf` calls allowed attacker-controlled strings from simulation save files to overflow a fixed-size stack buffer. Left unpatched, this flaw could enable arbitrary code execution by anyone who could craft a malicious save file. The fix replaces dangerous `sprintf` calls with bounded alternatives, closing the door on a classic but still devastatingly effective class of memory corru
A critical stack buffer overflow vulnerability was discovered and patched in count.c, where unsafe sprintf() calls wrote into fixed-size stack buffers without bounds checking, potentially allowing attackers to overwrite the stack and achieve arbitrary code execution. This fix eliminates a classic but dangerous class of memory corruption bugs that has plagued C programs for decades. Understanding how this vulnerability works — and how to prevent it — is essential knowledge for any developer worki
A critical stack buffer overflow vulnerability was discovered and patched in tpl.c, where command-line arguments were copied into fixed-size stack buffers using strcpy without any length validation. An attacker supplying an oversized argument could overwrite the saved return address on the stack, achieving complete control flow hijacking. The fix eliminates this classic but devastatingly effective vulnerability class that has plagued C programs for decades.
A critical stack buffer overflow vulnerability was discovered and patched in HardInfo2's cpu_util.c, where six unbounded sprintf() calls wrote locale-translated CPU topology labels into fixed-size stack buffers without length constraints. An attacker supplying a crafted translation file could overflow the stack buffer, overwrite saved return addresses, and potentially achieve arbitrary code execution. The fix replaces these dangerous calls with length-bounded alternatives, eliminating the overfl
A critical stack buffer overflow vulnerability was discovered and patched in `uae_integration.c`, where an unbounded `strcpy` call allowed attackers to overwrite stack memory and potentially execute arbitrary code. The fix eliminates the unsafe string copy operation, closing a direct path to arbitrary code execution on AmigaOS/AROS systems that lack modern memory protections like stack canaries and ASLR. This case is a timeless reminder that classic C memory safety bugs remain dangerous — especi
A critical stack buffer overflow vulnerability was discovered and patched in `src/dbodbc.c`, where unbounded `sprintf` calls allowed attackers to overflow a fixed-size buffer by supplying oversized DSN, UID, or PWD values in ODBC connection strings. Left unpatched, this flaw could enable attackers to overwrite saved return addresses and achieve arbitrary code execution. This post breaks down how the vulnerability works, how it was fixed, and what developers can do to prevent similar issues in th
A critical stack buffer overflow vulnerability was discovered and patched in `game/g_spawn.c`, where five unchecked `sprintf()` calls wrote attacker-influenced data into fixed-size stack buffers, potentially enabling arbitrary code execution via crafted map files or network packets. The fix eliminates this unsafe pattern, closing a code path that could have allowed a malicious actor to overwrite the saved return address and hijack program control flow. Understanding this class of vulnerability i
A critical stack-based buffer overflow vulnerability was discovered and patched in a C print module, where user-controlled strings were being copied into fixed-size buffers using the unsafe `strcpy` function. This classic CWE-120 vulnerability could have allowed an attacker to overwrite stack memory and potentially hijack program execution. The fix eliminates the unsafe string copy operations, closing a straightforward but dangerous exploitation path.