CVE-2024-53246: Splunk Information Disclosure Vulnerability

CVE-2024-53246 Overview

CVE-2024-53246 is a sensitive information disclosure vulnerability affecting Splunk Enterprise and Splunk Cloud Platform. The vulnerability exists in SPL (Search Processing Language) command processing, where an attacker can potentially extract sensitive information through crafted search queries. Successful exploitation requires chaining this vulnerability with another attack vector, such as a Risky Commands Bypass, making it a multi-stage attack scenario.

Critical Impact

Attackers exploiting this vulnerability could gain unauthorized access to sensitive information processed by Splunk, potentially exposing confidential data, credentials, or internal system details that could be leveraged for further attacks.

Affected Products

• Splunk Enterprise versions below 9.3.2, 9.2.4, and 9.1.7
• Splunk Cloud Platform versions below 9.3.2408.101, 9.2.2406.106, 9.2.2403.111, and 9.1.2312.206

Discovery Timeline

• 2024-12-10 - CVE-2024-53246 published to NVD
• 2025-03-10 - Last updated in NVD database

Technical Details for CVE-2024-53246

Vulnerability Analysis

This vulnerability is classified under CWE-319 (Cleartext Transmission of Sensitive Information), indicating that sensitive data may be transmitted or exposed without adequate protection. The flaw resides in how certain SPL commands handle and potentially expose sensitive information during search query execution.

The vulnerability is network-accessible and does not require user interaction or prior authentication for initial access, though successful exploitation depends on combining this flaw with another vulnerability like a Risky Commands Bypass. This chained attack requirement introduces complexity but does not diminish the potential impact on data confidentiality.

Root Cause

The root cause stems from insufficient protection of sensitive information within SPL command processing. When certain SPL commands are executed, they may inadvertently disclose sensitive data that should be protected or restricted. The cleartext transmission classification (CWE-319) suggests that data protection mechanisms within the affected commands are inadequate, allowing information leakage under specific conditions.

Attack Vector

The attack vector for CVE-2024-53246 requires a multi-stage approach:

1. Initial Access: The attacker must first exploit a secondary vulnerability, such as a Risky Commands Bypass, to gain the ability to execute restricted SPL commands
2. Information Extraction: Once the bypass is achieved, the attacker crafts specific SPL queries that trigger the information disclosure condition
3. Data Exfiltration: Sensitive information is returned through the search results or logged in an accessible location

The network-based attack vector means exploitation can occur remotely without physical access to the target system. Organizations exposing Splunk interfaces to untrusted networks face elevated risk.

Detection Methods for CVE-2024-53246

Indicators of Compromise

• Unusual SPL query patterns or execution of restricted/risky commands by unauthorized users
• Unexpected data access patterns in Splunk audit logs showing queries for sensitive indexes or sourcetypes
• Authentication anomalies or evidence of command bypass attempts in security logs

Detection Strategies

• Enable and monitor Splunk's internal audit logging for suspicious SPL command execution
• Implement behavioral analytics to detect unusual search patterns or data access anomalies
• Configure alerts for attempts to execute risky or restricted SPL commands

Monitoring Recommendations

• Review Splunk audit logs (_audit index) for unusual command execution patterns
• Monitor for failed authentication attempts followed by successful restricted command execution
• Implement SentinelOne Singularity to detect and correlate suspicious activity across your Splunk infrastructure

How to Mitigate CVE-2024-53246

Immediate Actions Required

• Upgrade Splunk Enterprise to version 9.3.2, 9.2.4, or 9.1.7 or later depending on your version branch
• Upgrade Splunk Cloud Platform to version 9.3.2408.101, 9.2.2406.106, 9.2.2403.111, or 9.1.2312.206 or later
• Review and restrict access to risky SPL commands through role-based access controls
• Audit user permissions and remove unnecessary elevated privileges

Patch Information

Splunk has released security updates addressing this vulnerability. Detailed patch information and upgrade instructions are available in the Splunk Security Advisory SVD-2024-1204. Organizations should prioritize upgrading to the fixed versions as soon as possible.

Workarounds

• Implement strict network segmentation to limit access to Splunk interfaces from untrusted networks
• Enable and configure Splunk's Risky Commands protection features to prevent bypass attempts
• Apply role-based access controls to restrict SPL command execution to authorized users only
• Consider deploying a web application firewall (WAF) to filter malicious queries targeting Splunk endpoints

# Example: Restrict risky SPL commands in authorize.conf
[role_user]
srchFilter = NOT (command=collect OR command=dump OR command=outputcsv)
importRoles = user