CVE-2021-28093 : Security Advisory and Response

This article provides an overview of CVE-2021-28093, discussing the vulnerability found in OX Documents before version 7.10.5-rev5, which results in Incorrect Access Control of converted images due to hash collisions from the use of Adler32.

Understanding CVE-2021-28093

In this section, we will delve into the details of CVE-2021-28093, its impact, technical aspects, and mitigation strategies.

What is CVE-2021-28093?

CVE-2021-28093 highlights a security flaw in OX Documents where the access control of converted images is compromised, potentially leading to unauthorized access.

The Impact of CVE-2021-28093

The vulnerability allows for hash collisions to occur, impacting the integrity of converted images and potentially enabling unauthorized users to access sensitive information.

Technical Details of CVE-2021-28093

Let's explore the technical aspects of CVE-2021-28093, including the vulnerability description, affected systems, and exploitation mechanisms.

Vulnerability Description

OX Documents before version 7.10.5-rev5 suffers from Incorrect Access Control of converted images due to hash collisions, caused by the use of Adler32.

Affected Systems and Versions

The vulnerability affects OX Documents versions prior to 7.10.5-rev5, exposing users who operate on these versions to the security risk.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging hash collisions caused by Adler32 to bypass access controls and potentially gain unauthorized entry.

Mitigation and Prevention

This section focuses on recommended steps to mitigate the risks associated with CVE-2021-28093 and safeguard systems from exploitation.

Immediate Steps to Take

Users are advised to update OX Documents to version 7.10.5-rev5 or newer to address the access control issue and prevent unauthorized access to converted images.

Long-Term Security Practices

Implementing robust access control mechanisms and regularly updating software can enhance the overall security posture and prevent similar vulnerabilities from being exploited.

Patching and Updates

Regularly applying security patches provided by the software vendor is crucial to staying protected against known vulnerabilities like CVE-2021-28093.