Security vulnerabilities and automated fixes for code execution issues
6 posts found
A critical arbitrary code execution vulnerability was discovered in `scripts/CommandBlock.js` where user-provided input from a text dialog was directly concatenated into an `eval()` call without any sanitization or sandboxing. The fix replaces the dangerous `eval()` with a `new Function()` constructor, which provides better scope isolation and eliminates the string concatenation injection vector.
A Jekyll plugin used unsafe Ruby backticks to execute a `git log` command with an unescaped file path, creating a command injection vulnerability. By switching to `Open3.capture2()` with argument array syntax, the fix prevents shell interpretation and eliminates the attack surface entirely.
A critical command injection vulnerability in `tools/dev/src/index.ts` allowed attackers to execute arbitrary shell commands through unsanitized subprocess arguments. The fix was simple but essential: explicitly setting `shell: false` in the `spawn()` call to prevent shell metacharacter interpretation. This vulnerability demonstrates why subprocess handling requires explicit security controls in Node.js.
A critical buffer overflow vulnerability was discovered in `src/script_engine/core/script_engine_core.c` at line 392, where `memcpy` copied an error message into a buffer without validating the source length against any maximum. The fix introduces a length cap of 4096 bytes and ensures proper null-termination, preventing heap corruption and potential remote code execution through crafted script error messages.
A critical buffer overflow vulnerability was discovered and patched in plugin.c, where five unbounded sprintf() calls wrote into fixed-size buffers without validating input length. An attacker controlling NVMe device names or plugin metadata could exploit this to overwrite return addresses and achieve arbitrary code execution. The fix eliminates these unsafe calls, closing a classic but devastatingly effective attack vector.
A critical buffer overflow vulnerability was discovered and fixed in the system restore utility where unbounded strcpy() calls allowed attacker-controlled data to overflow fixed-size buffers. This classic C programming mistake could enable arbitrary code execution through crafted tape archives, highlighting why secure string handling remains essential in 2024.