Rule Category

INDICATOR-COMPROMISE -- Snort detected a system behavior that suggests the system has been affected by malware. That behavior is known as an Indicator of Compromise (IOC). The symptoms could be a wide range of behaviors, from a suspicious file name to an unusual use of a utility. Symptoms do not guarantee an infection; your network configuration may not be affected by malware, but showing indicators as a result of a normal function. In this case, attackers may be attempting to gain privileges and access other systems, spread influence, and make calls and commands with elevated access. The context of the traffic is important to determine intrusion; traffic from an administration utility performing commands on a user's computer is likely not a compromise, but a user laptop accessing a webserver may indicate intrusion.

Alert Message

INDICATOR-COMPROMISE UPnP SUBSCRIBE Callback denial-of-service attempt

Rule Explanation

The UPNP implementation on many devices are vulnerable to a type of SSRF that would allow an attacker the ability to obtain data they otherwise would not have access to.

What To Look For

This rule will alert when an attempt is made to perform an external UPNP Subscriber Callback request is made against an internal system.

Known Usage

Public information/Proof of Concept available

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

No rule groups

CVE

Additional Links

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-2020-12695
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MITRE ATT&CK Framework

Tactic: Impact

Technique: Account Access Removal

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