CVE-2023-0587 : Vulnerability Insights and Analysis

This is a detailed overview of CVE-2023-0587, a file upload vulnerability affecting Trend Micro Apex One server build 11110.

Understanding CVE-2023-0587

This CVE refers to a critical vulnerability in Trend Micro Apex One server build 11110, allowing remote unauthenticated attackers to upload arbitrary files, potentially leading to a denial of service situation.

What is CVE-2023-0587?

The vulnerability arises from a file upload flaw in Trend Micro Apex One server build 11110. By sending a specifically crafted HTTP PUT message with a malformed Content-Length header to a particular URL on the server, remote attackers can upload files to a specific directory, potentially exhausting the available disk space.

The Impact of CVE-2023-0587

The impact of this vulnerability is significant as it can be exploited by malicious actors to fill up the server's file system, causing a denial of service by limiting storage availability. This can disrupt normal server operations and potentially lead to system downtime.

Technical Details of CVE-2023-0587

The technical aspects of CVE-2023-0587 shed light on the vulnerability's description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability allows unauthenticated remote attackers to upload arbitrary files to the SampleSubmission directory on the Trend Micro Apex One server, posing a serious risk of exhausting the available disk space.

Affected Systems and Versions

The affected system in this case is Trend Micro Apex One server with build version 11110. Any system running this specific build is vulnerable to exploitation through this file upload vulnerability.

Exploitation Mechanism

By leveraging a malformed Content-Length header in an HTTP PUT message directed to a specific URL on the server, attackers can upload files to a predetermined directory, ultimately leading to a potential denial of service scenario.

Mitigation and Prevention

To address CVE-2023-0587, it is crucial to take immediate steps, adopt long-term security practices, and ensure timely patching and updates.

Immediate Steps to Take

Implement network segmentation to isolate the affected server.
Consider restricting access to the vulnerable endpoint.
Monitor file uploads to detect and prevent unauthorized activities.

Long-Term Security Practices

Regularly conduct security assessments and audits to identify vulnerabilities.
Educate users and administrators on safe file upload practices and security measures.
Keep systems updated and apply security patches promptly.

Patching and Updates

Consult the vendor's security advisory for patches or updates addressing CVE-2023-0587. Apply the latest fixes to mitigate the vulnerability and enhance system security.