Heartbleed Continued - OpenSSL Client Memory Exposed
Summary: Cisco Talos reported that the Heartbleed flaw in OpenSSL versions 1.0.1 through 1.0.1f also exposes clients, not just servers, because clients process heartbeats through the same vulnerable functions tls1_process_heartbeat() and dtls1_process_heartbeat(). In internal testing, Talos extracted memory from client programs including curl and wget that link against the vulnerable OpenSSL versions, and released detection in SIDs 30520 through 30523.
Bottom line: A malicious server can read blocks of memory from any client linking the vulnerable OpenSSL, regardless of the client program's own version, so patching servers alone leaves curl, wget and other linked clients exposed until OpenSSL is upgraded to 1.0.1g or heartbeats are disabled.
Read the original at Cisco Talos ↗
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