CVE-2010-2503

Vulnerability

Multiple cross-site scripting (XSS) vulnerabilities exist in the Splunk Web component of Splunk versions 4.0 through 4.0.10 and 4.1 through 4.1.1. The vulnerabilities are triggered via (1) redirects (SPL-31067), (2) unspecified user-to-user or user-to-admin vectors (SPL-31084), and (3) unspecified user input (SPL-31085). Splunk light forwarders with Splunk Web disabled are not affected [1].

Exploitation

An attacker can exploit these vulnerabilities remotely by crafting malicious input or redirects that are processed by the Splunk Web server. No authentication is required; the attacker only needs network access to the Splunk Web interface. The attack vector involves sending a specially crafted URL or form input that, when processed by Splunk Web, injects arbitrary script into the browser of a user viewing the affected page [1].

Impact

Successful exploitation allows an attacker to execute arbitrary web script or HTML in the context of the Splunk Web interface. This can lead to session hijacking, credential theft, defacement, or other actions performed with the privileges of the victim user within Splunk [1].

Mitigation

Splunk strongly recommends upgrading to version 4.0.11 (for 4.0.x) or the latest version of Splunk (for 4.1.x). Alternatively, apply the critical security patch provided by Splunk. Additionally, implementing the Splunk Hardening Standards can reduce risk. At the time of the advisory, no active exploitation was known [1].