CVE-2023-26961 Explained : Impact and Mitigation

This CVE pertains to a vulnerability in Alteryx Server 2022.1.1.42590 that allows attackers to upload arbitrary files via a JSON document within a PUT /gallery/api/media request.

Understanding CVE-2023-26961

This section will delve into the details of the CVE-2023-26961 vulnerability in Alteryx Server 2022.1.1.42590.

What is CVE-2023-26961?

CVE-2023-26961 relates to an issue in Alteryx Server 2022.1.1.42590 where file type verification is not enforced for uploaded files. This flaw enables malicious actors to upload unauthorized files, such as JavaScript content for stored cross-site scripting (XSS) attacks, by manipulating the type field in a JSON document within a specific API request.

The Impact of CVE-2023-26961

The impact of CVE-2023-26961 is significant as it allows threat actors to upload and execute malicious scripts on the affected Alteryx Server, potentially leading to further exploitation of the system and unauthorized access to sensitive data.

Technical Details of CVE-2023-26961

In this section, we will explore the technical aspects of CVE-2023-26961, including the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability lies in the lack of file type verification for uploaded files in Alteryx Server 2022.1.1.42590, enabling attackers to upload arbitrary files via a JSON document within a specific API request.

Affected Systems and Versions

The issue affects Alteryx Server 2022.1.1.42590. Other versions may also be impacted if they exhibit similar file handling vulnerabilities.

Exploitation Mechanism

Attackers can exploit CVE-2023-26961 by sending a crafted PUT request to the /gallery/api/media endpoint, manipulating the type field in the JSON document to upload malicious files, such as scripts for XSS attacks.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-26961, immediate actions and long-term security practices are essential.

Immediate Steps to Take

Implement strict file type verification for uploaded files in Alteryx Server.
Regularly monitor and audit file uploads to detect any anomalies.
Apply security patches provided by the vendor promptly.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify vulnerabilities.
Educate users about safe file upload practices and potential risks.
Maintain up-to-date security policies and protocols to safeguard against similar vulnerabilities in the future.

Patching and Updates

Alteryx users should stay informed about security advisories from the vendor and apply patches and updates as soon as they are released to address CVE-2023-26961 and other security issues.