CVE-2023-48704 : Exploit Details and Defense Strategies
Discover the impact of CVE-2023-48704, a high-severity unauthenticated heap buffer overflow vulnerability affecting ClickHouse versions < 23.9.2.47551. Learn about the exploitation mechanism and mitigation steps.
A heap buffer overflow vulnerability has been identified in the ClickHouse server, affecting versions prior to 23.9.2.47551, 23.10.5.20, 23.3.18.15, 23.8.8.20, and 23.9.6.20. Attackers can exploit this security flaw without authentication, potentially causing the server to crash.
Understanding CVE-2023-48704
This section provides insights into the nature of the CVE-2023-48704 vulnerability.
What is CVE-2023-48704?
CVE-2023-48704 is an unauthenticated heap buffer overflow vulnerability discovered in ClickHouse, an open-source database management system. The issue lies in the Gorilla codec decompression logic, allowing attackers to send specially crafted payloads to trigger the vulnerability.
The Impact of CVE-2023-48704
The impact of this vulnerability is rated as HIGH, with a base severity score of 7. Attackers can exploit the bug over the network without requiring any user interaction, potentially leading to a denial of service.
Technical Details of CVE-2023-48704
Detailed technical information related to CVE-2023-48704 is outlined in this section.
Vulnerability Description
The vulnerability stems from a heap buffer overflow in the Gorilla codec decompression logic, potentially leading to a server crash.
Affected Systems and Versions
ClickHouse versions prior to 23.9.2.47551, 23.10.5.20, 23.3.18.15, 23.8.8.20, and 23.9.6.20 are affected by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by sending malicious payloads to the ClickHouse server's default native interface on port 9000/tcp.
Mitigation and Prevention
In this section, we discuss the steps that can be taken to mitigate the risks associated with CVE-2023-48704.
Immediate Steps to Take
Users are advised to update their ClickHouse installations to the patched versions, namely 23.9.2.47551, 23.10.5.20, 23.3.18.15, 23.8.8.20, or 23.9.6.20, to address the vulnerability.
Long-Term Security Practices
Implementing network segmentation, regular security updates, and monitoring for anomalous network activity can help enhance the overall security posture.
Patching and Updates
Regularly applying security patches and updates released by ClickHouse can help protect against known vulnerabilities and ensure a secure environment.