CVE-2010-3323 in Splunk
Summary
by MITRE
Splunk 4.0.0 through 4.1.4 allows remote attackers to conduct session hijacking attacks and obtain the splunkd session key via vectors related to the SPLUNKD_SESSION_KEY parameter.
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Analysis
by VulDB Data Team • 09/24/2021
The vulnerability identified as CVE-2010-3323 affects Splunk versions 4.0.0 through 4.1.4 and represents a critical session hijacking flaw that compromises the security of Splunk's authentication mechanism. This vulnerability specifically targets the SPLUNKD_SESSION_KEY parameter, which serves as a critical component in maintaining secure user sessions within the Splunk platform. The flaw enables remote attackers to exploit weaknesses in how session keys are managed and transmitted, potentially allowing unauthorized access to administrative functions and sensitive data within the Splunk environment.
The technical implementation of this vulnerability stems from improper handling of session key parameters during the authentication process. Attackers can manipulate the SPLUNKD_SESSION_KEY parameter to either obtain valid session tokens or predict session identifiers, effectively bypassing the normal authentication mechanisms that should protect Splunk's administrative interface. This weakness aligns with CWE-305 authentication bypass vulnerabilities and represents a significant deviation from secure session management practices. The vulnerability operates at the application layer and requires no local privileges or specialized equipment to exploit, making it particularly dangerous in production environments where Splunk serves as a central security information and event management platform.
The operational impact of CVE-2010-3323 extends beyond simple unauthorized access to encompass potential data breaches, privilege escalation, and complete system compromise. An attacker who successfully exploits this vulnerability can gain administrative access to Splunk instances, potentially allowing them to modify search queries, access log data, alter system configurations, and even exfiltrate sensitive information from the security monitoring platform. This threat is particularly severe because Splunk typically processes and stores highly sensitive security-related data, including system logs, network traffic analysis, and security event information. The vulnerability creates a persistent threat vector that remains active until the affected software is properly patched, potentially allowing attackers to maintain long-term access to compromised systems.
Mitigation strategies for CVE-2010-3323 require immediate implementation of software updates to versions that address the session key handling flaws. Organizations should also implement network segmentation to limit access to Splunk instances, enforce strict firewall rules, and monitor for unusual authentication patterns or session activity. Security teams should conduct comprehensive vulnerability assessments to identify all affected Splunk installations and establish monitoring procedures to detect potential exploitation attempts. The remediation process should include disabling unnecessary administrative access, implementing multi-factor authentication where possible, and ensuring that session tokens are properly validated and rotated. This vulnerability demonstrates the critical importance of secure session management and aligns with ATT&CK techniques related to credential access and privilege escalation, emphasizing the need for robust authentication controls in security monitoring platforms.