SERVER-OTHER -- Snort has detected traffic exploiting vulnerabilities in a server in the network.
SERVER-OTHER OpenSSL TLS record tampering denial of service attempt
The vulnerability occurs when OpenSSL client tries to establish a session but receives a Warning alert followed by a Handshake record with the a Finished message from the server, causing OpenSSL to terminate and thus create a Denial Of Service condition. The rule identifies the unique warning TLS record and finish handshake causing the DOS.
The vulnerability occurs when OpenSSL client tries to establish a session but receives a Warning alert followed by a Handshake record with the a Finished message from the server, causing OpenSSL to terminate and thus create a Denial Of Service condition.
No public information
No known false positives
Cisco Talos Intelligence Group
Tactic: Impact
Technique: Endpoint Denial of Service
For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org
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-2013-4353The ssl3_take_mac function in ssl/s3_both.c in OpenSSL 1.0.1 before 1.0.1f allows remote TLS servers to cause a denial of service (NULL pointer dereference and application crash) via a crafted Next Protocol Negotiation record in a TLS handshake. |
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