CVE-2018-19143 : Security Advisory and Response

A flaw in the Open Ticket Request System (OTRS) versions 4.0.x up to 4.0.33, 5.0.x up to 5.0.31, and 6.0.x up to 6.0.13 has been discovered, potentially allowing authenticated users to delete files by manipulating a submission form due due to mishandling of upload caching.

Understanding CVE-2018-19143

This CVE entry pertains to a vulnerability found in multiple versions of the Open Ticket Request System (OTRS) software.

What is CVE-2018-19143?

The CVE-2018-19143 vulnerability involves a flaw in OTRS versions 4.0.x up to 4.0.33, 5.0.x up to 5.0.31, and 6.0.x up to 6.0.13 that could be exploited by authenticated users to delete files through manipulation of a submission form due to mishandling of upload caching.

The Impact of CVE-2018-19143

This vulnerability could potentially lead to unauthorized deletion of files by authenticated users, compromising data integrity and system availability.

Technical Details of CVE-2018-19143

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The flaw in OTRS versions 4.0.x up to 4.0.33, 5.0.x up to 5.0.31, and 6.0.x up to 6.0.13 allows authenticated users to delete files via a modified submission form due to mishandling of upload caching.

Affected Systems and Versions

OTRS versions 4.0.x up to 4.0.33
OTRS versions 5.0.x up to 5.0.31
OTRS versions 6.0.x up to 6.0.13

Exploitation Mechanism

The vulnerability can be exploited by authenticated users manipulating a submission form to delete files due to the mishandling of upload caching.

Mitigation and Prevention

To address CVE-2018-19143, follow these mitigation and prevention strategies:

Immediate Steps to Take

Update OTRS to the latest patched version.
Monitor file deletion activities for suspicious behavior.
Restrict user permissions to minimize the impact of potential file deletions.

Long-Term Security Practices

Regularly review and update security configurations.
Conduct security training for users to prevent unauthorized actions.
Implement file integrity monitoring to detect and respond to file deletions.

Patching and Updates

Apply security patches provided by OTRS promptly.