Security vulnerabilities and automated fixes for tls issues
4 posts found
A critical security vulnerability was discovered in `plugins/python-build/scripts/add_cpython.py` where `requests.get()` calls to the GitHub API and OpenSSL release endpoints lacked explicit TLS certificate verification enforcement and consistent error handling. While Python's `requests` library defaults to `verify=True`, the absence of explicit enforcement and centralized error handling left the build tool exposed to man-in-the-middle attacks that could inject malicious package data. The fix in
A critical integer overflow vulnerability was discovered in OpenSSL's `tls1_export_keying_material()` function inside `ssl/t1_enc.c`, where attacker-influenced length values could wrap around during arithmetic, causing the `vallen` buffer to be allocated far smaller than needed. The four subsequent `memcpy` calls would then write beyond the heap buffer boundary, enabling potential remote code execution. The fix adds two targeted overflow checks before the arithmetic operations, preventing the al
A critical heap buffer overflow vulnerability was discovered and patched in `src/ssl.c`, where improper bounds checking during ALPN/NPN protocol list construction could allow an attacker to corrupt heap memory and potentially execute arbitrary code. The fix addresses both the missing capacity validation and a dangerous integer overflow in size arithmetic that could lead to undersized allocations followed by out-of-bounds writes. Understanding this class of vulnerability is essential for any deve
A medium-severity vulnerability was discovered in a JavaScript streaming application where insecure WebSocket (ws://) connections were being used instead of secure WebSocket (wss://) connections. This security gap could expose sensitive data to man-in-the-middle attacks, allowing attackers to intercept and manipulate real-time communication between clients and servers.