CVE-2014-8303 in Splunk
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Splunk Web in Splunk Enterprise 6.1.x before 6.1.4 and 6.0.x before 6.0.6 allows remote attackers to inject arbitrary web script or HTML via vectors related to event parsing.
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Analysis
by VulDB Data Team • 03/30/2022
The CVE-2014-8303 vulnerability represents a critical cross-site scripting flaw within Splunk Enterprise's web interface, specifically affecting versions prior to the mentioned security patches. This vulnerability resides in the Splunk Web component that handles event parsing operations, creating a pathway for remote attackers to execute malicious scripts within the context of authenticated user sessions. The flaw manifests when the web interface processes user-supplied data without proper sanitization, allowing attackers to inject malicious HTML or JavaScript code that gets executed when other users view the affected content. This type of vulnerability falls under CWE-79, which specifically addresses cross-site scripting flaws in software applications.
The technical exploitation of this vulnerability occurs through the event parsing functionality within Splunk Web, where input validation mechanisms fail to properly sanitize user-provided data before rendering it in web pages. Attackers can craft malicious payloads that, when processed by the vulnerable Splunk instance, get stored or displayed in a way that executes arbitrary code within the browser context of other users. The attack vector specifically targets the event parsing components that handle data ingestion and display, making it particularly dangerous in environments where Splunk processes untrusted data from various sources. This vulnerability enables attackers to perform session hijacking, steal sensitive information, or redirect users to malicious websites, all while operating within the legitimate Splunk Web interface.
The operational impact of CVE-2014-8303 extends beyond simple script injection, as it fundamentally compromises the integrity of the Splunk Web interface and the trust relationships between users and the system. Organizations relying on Splunk for security monitoring and log analysis face significant risks when this vulnerability exists, as attackers can exploit it to gain access to sensitive security data, system configurations, or user credentials. The vulnerability is particularly concerning in enterprise environments where Splunk is used for security information and event management, as it allows adversaries to manipulate log data displays and potentially hide their malicious activities within legitimate system events. This type of vulnerability directly aligns with ATT&CK technique T1566, which covers social engineering through malicious content injection, and T1071, which involves application layer protocol usage.
Organizations should immediately implement the security patches released by Splunk for versions 6.1.4 and 6.0.6 to remediate this vulnerability. The patch addresses the input validation issues in the event parsing components by implementing proper sanitization of user-supplied data before rendering in web contexts. Additional mitigations include implementing web application firewalls to monitor for suspicious script injection patterns, restricting user permissions to minimize the impact of potential exploitation, and conducting regular security assessments of Splunk configurations. Network segmentation and monitoring of Splunk Web traffic can help detect anomalous activities associated with exploitation attempts, while regular security training for administrators can improve recognition of potential attack vectors. The vulnerability demonstrates the critical importance of input validation in web applications and highlights the necessity of maintaining current security patches for enterprise monitoring platforms.