Heartbleed for OpenVPN
Summary: Cisco Talos' Vulnerability Research Team wrote working Heartbleed exploits for OpenVPN running over both TCP and UDP, extending the OpenSSL flaw beyond HTTPS servers. OpenVPN's optional HMAC signing of messages raises the bar for attackers, but many servers leave it disabled and are vulnerable to memory disclosure without authentication; detection spans SIDs 30711 through 30742.
Why it matters: An OpenVPN server with HMAC signing disabled can leak memory to an unauthenticated attacker, and Talos says many are configured exactly that way - so the exposure is not the Heartbleed flaw alone but the default posture of the VPN endpoints your remote workforce depends on.
Read the original at Cisco Talos ↗
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