CVE-2018-6511 in Puppet Enterprise
Summary
by MITRE
A cross-site scripting vulnerability in Puppet Enterprise Console of Puppet Enterprise allows a user to inject scripts into the Puppet Enterprise Console when using the Puppet Enterprise Console. Affected releases are Puppet Puppet Enterprise: 2017.3.x versions prior to 2017.3.6.
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Analysis
by VulDB Data Team • 03/08/2023
The cross-site scripting vulnerability identified as CVE-2018-6511 represents a critical security flaw within the Puppet Enterprise Console component of the Puppet Enterprise platform. This vulnerability specifically affects versions 2017.3.x prior to 2017.3.6, creating a significant attack surface that malicious actors could exploit to compromise the security of enterprise infrastructure management systems. The Puppet Enterprise Console serves as the primary web-based interface for administrators to manage and configure their infrastructure, making it a prime target for attackers seeking to gain unauthorized access or execute malicious code within the enterprise environment.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output encoding within the Puppet Enterprise Console's web interface. When users interact with the console, particularly when submitting data or navigating through various management functions, the system fails to properly sanitize user-supplied input before rendering it in the browser context. This flaw allows attackers to inject malicious scripts that execute in the context of other users' sessions, potentially enabling session hijacking, data exfiltration, or privilege escalation attacks. The vulnerability specifically manifests when the console processes user input without proper sanitization, creating opportunities for attackers to craft malicious payloads that exploit the browser's scripting capabilities.
The operational impact of this vulnerability extends beyond simple script injection, as it fundamentally undermines the security posture of organizations relying on Puppet Enterprise for infrastructure automation. Attackers could leverage this vulnerability to execute arbitrary code within the context of the victim's browser session, potentially gaining access to sensitive configuration data, administrative credentials, or other privileged information. The attack vector is particularly concerning because it requires minimal privileges to exploit, as the vulnerability exists within the web interface that many users access regularly. Organizations using affected versions of Puppet Enterprise face significant risks including potential data breaches, unauthorized system modifications, and the compromise of critical infrastructure management capabilities. The vulnerability also creates opportunities for attackers to establish persistent access through session manipulation and credential theft.
Mitigation strategies for CVE-2018-6511 should prioritize immediate patching of affected Puppet Enterprise installations to version 2017.3.6 or later, which contains the necessary security fixes to prevent XSS exploitation. Organizations should also implement additional defensive measures including web application firewalls that can detect and block malicious script payloads, enhanced input validation at multiple layers of the application stack, and regular security assessments of the Puppet Enterprise Console. Network segmentation and privilege separation can help limit the potential impact of successful exploitation, while comprehensive monitoring and alerting systems should be deployed to detect unusual activity patterns that may indicate attempted exploitation. Organizations should also conduct thorough security training for administrators to recognize potential social engineering attempts that might accompany XSS attacks, and establish incident response procedures specifically tailored to address web application security vulnerabilities. The vulnerability aligns with CWE-79, which catalogs cross-site scripting flaws, and represents a common attack pattern that maps to ATT&CK technique T1059.007 for script execution through web interfaces, highlighting the need for comprehensive web application security controls in enterprise infrastructure management platforms.