CVE-2022-43566 in Splunk
Summary
by MITRE • 11/05/2022
In Splunk Enterprise versions below 8.2.9, 8.1.12, and 9.0.2, an authenticated user can run risky commands using a more privileged user’s permissions to bypass SPL safeguards for risky commands https://docs.splunk.com/Documentation/SplunkCloud/latest/Security/SPLsafeguards in the Analytics Workspace. The vulnerability requires the attacker to phish the victim by tricking them into initiating a request within their browser. The attacker cannot exploit the vulnerability at will.
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Analysis
by VulDB Data Team • 12/04/2022
The vulnerability identified as CVE-2022-43566 represents a critical authorization bypass flaw within Splunk Enterprise platforms across multiple version lines including 8.2.8 and earlier, 8.1.11 and earlier, and 9.0.1 and earlier. This security weakness specifically targets the Analytics Workspace functionality and exploits a design flaw in how SPL (Search Processing Language) safeguards are enforced. The vulnerability stems from improper privilege escalation mechanisms that allow authenticated users to execute potentially dangerous commands with elevated permissions, effectively circumventing the built-in security controls designed to protect against malicious search queries.
The technical implementation of this vulnerability occurs through a sophisticated session manipulation attack vector that leverages browser-based request initiation. An attacker must first establish a phishing campaign to trick a legitimate user into performing an action within their browser session, typically through social engineering techniques that exploit user trust. The attack exploits the fact that certain privileged commands can be executed through the Analytics Workspace interface when the victim's session is active, allowing the attacker to utilize the victim's existing permissions and privileges. This particular flaw aligns with CWE-285, which addresses improper authorization in software systems, and represents a classic example of how browser-based attacks can be used to escalate privileges in enterprise security platforms.
The operational impact of this vulnerability extends beyond simple command execution, as it enables attackers to potentially access sensitive data, modify search configurations, and perform operations that should be restricted to administrators or users with specific clearance levels. The SPL safeguards that are meant to prevent execution of dangerous commands such as those that could modify system configurations or access restricted data sets are effectively bypassed. This creates a significant risk for organizations relying on Splunk for security monitoring and log analysis, as compromised user accounts could be leveraged to perform unauthorized operations that would otherwise be blocked by the platform's security controls. The attack requires user interaction and cannot be exploited automatically, but the potential for widespread impact remains high given the privileged nature of the commands that can be executed.
Organizations should prioritize immediate remediation through the application of patches released by Splunk for versions 8.2.9, 8.1.12, and 9.0.2, which address the core authorization bypass mechanism. Security teams should implement enhanced monitoring for unusual search activity patterns that might indicate exploitation attempts, particularly focusing on privileged command executions within the Analytics Workspace. Network segmentation and privilege management should be reviewed to limit the potential impact of compromised accounts. The vulnerability demonstrates the importance of proper access control implementation and highlights the need for comprehensive security testing of enterprise platforms. Organizations should also consider implementing additional layers of protection such as privileged access management solutions and enhanced user behavior analytics to detect and prevent exploitation attempts. This vulnerability serves as a reminder of the critical importance of maintaining up-to-date security patches and the potential risks posed by browser-based attack vectors in enterprise security environments.