SERVER-OTHER -- Snort has detected traffic exploiting vulnerabilities in a server in the network.
SERVER-OTHER OpenSSL OCSP Status Request Extension denial of service attempt
Multiple memory leaks in t1_lib.c in OpenSSL before 1.0.1u, 1.0.2 before 1.0.2i, and 1.1.0 before 1.1.0a allow remote attackers to cause a denial of service (memory consumption) via large OCSP Status Request extensions. Impact: CVSS base score 7.5 CVSS impact score 3.6 CVSS exploitability score 3.9 confidentialityImpact NONE integrityImpact NONE availabilityImpact NONE Details: Ease of Attack:
Rule alerts when an attempt to trigger DoS with 100 OCSP status request packets sent within 10 seconds.
No public information
No known false positives
Cisco Talos Intelligence Group
MITRE::ATT&CK Framework::Enterprise::Impact::Endpoint Denial of Service::Application or System Exploitation
MITRE::ATT&CK Framework::Enterprise::Initial Access::Exploit Public-Facing Application
Denial of Service
Denial of Service attacks aim to make a server or program unresponsive for users. These attacks may be volume-based, to overwhelm the system, or they may use certain logical flaws in the software to cut the service off from the users. The attack may come from one or multiple sources. These attacks do not usually lead to a remote code execution. Volume based attacks are best handled using a firewall application.
CVE-2016-6304 |
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