SID 1:64244

Rule Category

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

Alert Message

SERVER-WEBAPP VMware vRealize Operations Manager potential server-side request forgery attempt

Rule Explanation

This rule looks for inbound requests to the "/casa/nodes/thumbprints" endpoint on VMware vRealize Operations Manager web applications that will cause the server to make an outbound request to the address present in the HTTP client body.

What To Look For

This rule looks for potential attempts to exploit a server-side request forgery vulnerability in the VMware vRealize Operations Manager web application.

Known Usage

Attacks/Scans seen in the wild

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

Rule Categories::Server::Web Applications

MITRE::ATT&CK Framework::Enterprise::Initial Access::Exploit Public-Facing Application

Adversaries may attempt to take advantage of a weakness in an Internet-facing computer or program using software, data, or commands in order to cause unintended or unanticipated behavior. The weakness in the system can be a bug, a glitch, or a design vulnerability. These applications are often websites, but can include databases (like SQL), standard services (like SMB or SSH), network device administration and management protocols (like SNMP and Smart Install), and any other applications with Internet accessible open sockets, such as web servers and related services.

CVE

CVE-2021-21975

Additional Links

www.vmware.com/security/advisories/VMSA-2021-0004.html

Rule Vulnerability

Server-Side Request Forgery

Server-Side Request Forgery (SSRF) attackers abuse functionality on the server to read or update internal resources. The attacker can supply or modify a URL for the server to read or submit data to. By carefully selecting the URLs, the attacker may be able to read server configuration such as AWS metadata, connect to internal services like http enabled databases or perform post requests for internal services which are not intended to be exposed.

CVE Additional Information

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

CVE-2021-21975

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