Rule Document 1:66562

Rule Category

SERVER-WEBAPP -- Snort has detected traffic exploiting vulnerabilities in web based applications on servers.

Alert Message

SERVER-WEBAPP ELOG Project ELOG null pointer dereference attempt

Rule Explanation

This rule looks for HTTP requests to the "/Demo1/" endpoint that contain the upload command parameter "acmd=Upload" but omit the attachment count parameter "drop-count". Successful exploitation causes the target service to crash, resulting in a denial‑of‑service condition.

What To Look For

This rule fires on attempts to exploit a null pointer dereference vulnerability in ELOG web applications.

Known Usage

Public information/Proof of Concept available

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

Rule Categories::Server::Web Applications

MITRE::ATT&CK Framework::Enterprise::Impact::Endpoint Denial of Service::Application or System Exploitation

Vulnerability::Severity::Critical

Vulnerability::Severity::Medium

Vulnerability::Severity::High

CVE

CVE-2019-3995

Rule Vulnerability

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 Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.

CVE-2019-3995

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