Rule Document 1:65477

Rule Category

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

Alert Message

SERVER-WEBAPP Smartstore SmartStoreNET ForumPost cross site scripting attempt

Rule Explanation

This rule looks for attempts to bypass the regex that does transformation on text data inside of a submitted forum post prior to being posted. Attacks who abuse this exploit can create forum posts with custom javascript that can be used to steal credentials, impersonate users, or further compromise a victim.

What To Look For

This rule alerts on attempts to exploit a stored cross site scripting attempt in forum posts in Smartstore SmartStoreNET.

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::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.

Vulnerability::Severity::High

Vulnerability::Severity::Critical

CVE

CVE-2021-32608

Rule Vulnerability

Cross Site Scripting (XSS)

Cross Site Scripting (XSS) attackers send malicious input to a site that does not validate the input, usually in the form of a script. The application sends the malicious code to the browsers of other users, which will execute the script unknowingly. The malicious code uses the trust of the host website to access cookies, session tokens, or other sensitive information. There are multiple types of XSS, including Stored, Reflected, and DOM based.

CVE Additional Information

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

CVE-2021-32608

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