Rule Category

SERVER-OTHER -- Snort has detected traffic exploiting vulnerabilities in a server in the network.

Alert Message

SERVER-OTHER Microsoft Windows DNS server remote code execution attempt

Rule Explanation

The rule verifies that packet is DNS response and checks for injected Answers.

What To Look For

If a malicious actor can intercept DNS queries going from local DNS server to Root DNS server, it can inject Answers in response from the Root DNS server that can lead to remote code execution on local DN server. The rule detect the modified response.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Initial Access

Technique: Exploit Public-Facing Application

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

Additional Links

Rule Vulnerability

Use After Free

Use After Free (UAF) attacks target computer memory flaws to corrupt the memory execute code. The name refers to attempts to use memory after it has been freed, which can cause a program to crash under normal circumstances, or result in remote code execution in a successful attack.

CVE Additional Information