CVE-2014-0160 Vulnerability

CVE-2014-0160 is a memory-handling vulnerability that arises due to improper bounds checking of the payload length parameter in the heartbeat extension of OpenSSL. Attackers send crafted heartbeat requests to exploit the buffer over-read error, causing the system to return an excessive amount of memory data—up to 64KB per request. This data leakage makes sensitive information available for adversaries without direct system access.

Tactics, Techniques & Procedures (TTPs)

Attackers leveraging this vulnerability craft malicious heartbeat requests to extract memory data repeatedly. The issue is often exploited to retrieve keys or credentials, enabling further unauthorized access or man-in-the-middle (MITM) attacks.

Indicators of compromise

To monitor, look for unusual SSL/TLS connections or heartbeat activity from unverified IPs. Specific IOCs include irregular network traffic originating from known OpenSSL vulnerabilities and unusual use of valid session keys.

Known proof-of-concepts & exploits

Proof-of-concepts are publicly available on platforms such as GitHub and Exploit-DB, and the vulnerability has seen widespread exploitation across the internet. Key campaigns included exploitation of vulnerable servers to compromise HTTPS-secured communications.