CVE-2023-40595 : What You Need to Know
Learn about CVE-2023-40595, a vulnerability in Splunk Enterprise and Splunk Cloud allowing remote code execution via serialized session payload. High severity, update recommended.
This article provides detailed information about CVE-2023-40595, a vulnerability that allows remote code execution via serialized session payload in Splunk Enterprise and Splunk Cloud.
Understanding CVE-2023-40595
CVE-2023-40595 is a security vulnerability that affects Splunk Enterprise versions lower than 8.2.12, 9.0.6, and 9.1.1, as well as Splunk Cloud versions lower than 9.0.2305.200. It allows an attacker to execute arbitrary code by exploiting a specially crafted query.
What is CVE-2023-40595?
In Splunk Enterprise and Splunk Cloud, an attacker can execute a specially crafted query to serialize untrusted data. By doing so, the attacker gains the ability to execute arbitrary code, leading to potential remote code execution and unauthorized access.
The Impact of CVE-2023-40595
The impact of CVE-2023-40595 is rated as HIGH, with a CVSS v3.1 base score of 8.8. This vulnerability poses a significant risk to organizations using affected versions of Splunk due to the potential for remote code execution and data compromise.
Technical Details of CVE-2023-40595
Vulnerability Description
The vulnerability arises from the deserialization of untrusted data without proper validation, enabling attackers to exploit the system and execute malicious code remotely.
Affected Systems and Versions
- Splunk Enterprise versions less than 8.2.12, 9.0.6, and 9.1.1
- Splunk Cloud versions less than 9.0.2305.200
Exploitation Mechanism
Attackers can weaponize specially crafted queries to serialize untrusted data in Splunk Enterprise and Splunk Cloud, allowing them to execute arbitrary code and potentially take control of the system.
Mitigation and Prevention
Immediate Steps to Take
Organizations are advised to update Splunk Enterprise to versions 8.2.12, 9.0.6, or 9.1.1, and Splunk Cloud to version 9.0.2305.200 to mitigate the CVE-2023-40595 vulnerability.
Long-Term Security Practices
Implement strong input validation mechanisms and access controls to prevent unauthorized queries and mitigate the risk of remote code execution.
Patching and Updates
Regularly apply security patches and updates provided by Splunk to address known vulnerabilities and strengthen the overall security posture.