This signature detects an attempt to read the contents of the RAM of a system running a vulnerable version of OpenSSL, aka the Heartbleed attack. This vulnerability is further documented as CVE-2014-0160.This signature is a meta signature with components of 4187-0 and 4187-1. Both components need to be enabled in order for this signature to function.
Use of this signature may cause a negative performance impact on the sensor. Event action filters should be used to exclude IP addresses the signature alerts on that are not running vulnerable versions of OpenSSL.
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