CVE-2023-30443: IBM Db2 Vulnerability - Denial of Service Attack through Specially Crafted Query

A new vulnerability has been identified in IBM Db2 for Linux, UNIX, and Windows (includes Db2 Connect Server) with versions 10.5, 11.1, and 11.5, which can lead to a denial of service (DoS) attack. The vulnerability is tracked as CVE-2023-30443 and has a significant impact on the availability of the targeted system. A threat actor can exploit this vulnerability by sending a specially crafted query to the database, causing the system to crash or become unresponsive.

In this detailed post, we will discuss the essential aspects of this vulnerability, including the code snippet that demonstrates the exploit, links to original references, and the necessary remediation steps.

Exploit Details

CVE-2023-30443 is a vulnerability that stems from improper handling of certain query structures in the IBM Db2 system. As a result, an attacker can craft a malicious query, manipulating the affected database's operations and causing the system to crash or become unresponsive.

Here is a sample code snippet that demonstrates the exploit

SELECT * FROM mytable WHERE
  (SELECT TO_DOUBLE(myfield) FROM mytable) > -1;

In this hypothetical example scenario, the crafted query uses the TO_DOUBLE conversion function on a table "mytable" with a field "myfield" in a subquery. With specific input data, this vulnerable function could trigger a denial of service, causing the system to become unresponsive or crash.

Links to Original References

The following links provide official information about CVE-2023-30443, including related resources, patches, and advisories:

1. IBM Security Bulletin: This official advisory provides detailed information about the vulnerability and the affected versions.

2. CVE-2023-30443 Details: This link points to the CVE reference for this vulnerability, offering a detailed description and related resources.

3. NVD - CVE-2023-30443: This official National Vulnerability Database (NVD) page provides a summary and analysis of this vulnerability, including CVSS scoring and related information.

Remediation Steps

To mitigate the risk associated with CVE-2023-30443, IBM has released a patch for IBM Db2 versions 10.5, 11.1, and 11.5. System administrators should apply the patch as soon as possible to protect the affected systems from potential exploitation.

The detailed instructions for applying the patch can be found on the IBM Security Bulletin previously mentioned. It is also recommended that system administrators review the patch release notes and understand any potential implications during the patch process.

Conclusion

CVE-2023-30443 is a serious vulnerability that can disrupt the availability of affected systems. By examining the code snippet, original references, and remediation steps, it is evident that applying the patch and understanding the technical underpinnings can help organizations protect their system infrastructure from potential exploitation.

Timeline

Published on: 12/19/2024 01:04:07 UTC