CVE-2013-6870 in Splunk
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Splunk Web in Splunk before 5.0.6 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 12/23/2024
The vulnerability identified as CVE-2013-6870 represents a critical cross-site scripting flaw within Splunk Web, affecting versions prior to 5.0.6. This vulnerability resides in the web interface component of Splunk, a widely used platform for searching, monitoring, and analyzing machine-generated data. The issue stems from insufficient input validation and output encoding mechanisms within the Splunk Web application, creating an exploitable condition that enables remote attackers to inject malicious scripts into web pages viewed by other users. The unspecified vectors suggest that the vulnerability could potentially be triggered through multiple entry points within the web interface, including but not limited to search parameters, configuration settings, or user-generated content fields. This type of vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a critical weakness in web applications where user-supplied data is not properly sanitized before being rendered in web pages. The attack surface is particularly concerning given Splunk's role in enterprise environments where sensitive operational data is frequently analyzed and monitored.
The technical exploitation of this vulnerability allows attackers to execute arbitrary JavaScript code within the context of a victim's browser session, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The impact extends beyond simple script injection as it can enable attackers to perform actions on behalf of authenticated users, potentially compromising the integrity of the Splunk environment and the data it manages. Given that Splunk is commonly used for security monitoring and log analysis, an attacker who successfully exploits this vulnerability could gain access to sensitive operational data, system logs, and potentially escalate privileges within the monitored environment. The vulnerability's remote nature means that attackers do not require physical access to the system or local network presence to exploit it, making it particularly dangerous in networked environments where Splunk instances are exposed to external traffic.
Organizations utilizing Splunk Web are at significant risk from this vulnerability as it can be exploited by attackers with minimal technical expertise to compromise web-based security controls. The operational impact includes potential data breaches, unauthorized access to monitoring systems, and the possibility of attackers using the compromised Splunk instance as a pivot point for further attacks within the network infrastructure. The vulnerability also raises concerns about the integrity of security monitoring data, as attackers could potentially manipulate or hide their activities within the Splunk environment. This type of attack vector aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter: JavaScript, demonstrating how attackers can leverage web-based vulnerabilities to execute malicious code. The exploitation typically involves crafting malicious input that gets stored and subsequently executed when other users view the affected pages, making it particularly insidious as the attack may go unnoticed for extended periods.
The recommended mitigation strategy involves upgrading to Splunk version 5.0.6 or later, which includes the necessary patches to address the XSS vulnerability. Organizations should also implement additional defensive measures such as input validation, output encoding, and regular security assessments of their Splunk installations. Network segmentation and access controls should be enforced to limit exposure of Splunk Web interfaces to untrusted networks. Security monitoring should be enhanced to detect unusual patterns in Splunk search queries or user activity that might indicate exploitation attempts. The vulnerability highlights the importance of maintaining current security patches and implementing comprehensive web application security controls. Organizations should also consider implementing web application firewalls and content security policies to provide additional layers of protection against similar vulnerabilities. Regular security training for administrators and developers on secure coding practices remains essential to prevent such vulnerabilities from being introduced in the first place, particularly given that CWE-79 vulnerabilities are among the most commonly exploited weaknesses in web applications according to industry security reports.