CVE-2021-28684 : Exploit Details and Defense Strategies

This article provides details about CVE-2021-28684, a vulnerability in ConeXware PowerArchiver that allows for potential exfiltration of local files over the network through an XXE attack.

Understanding CVE-2021-28684

This section delves into the specifics of CVE-2021-28684.

What is CVE-2021-28684?

The vulnerability in ConeXware PowerArchiver before version 20.10.02 enables the processing of external entities, opening the possibility of local file exfiltration over the network using an XXE attack.

The Impact of CVE-2021-28684

The exploitation of this vulnerability could result in sensitive local files being accessed and leaked over the network, potentially leading to unauthorized exposure of critical data.

Technical Details of CVE-2021-28684

Explore the technical aspects of CVE-2021-28684 in this section.

Vulnerability Description

The XML parser in ConeXware PowerArchiver allows the handling of external entities, creating a security loophole that malicious actors could abuse through XXE attacks to extract local files.

Affected Systems and Versions

All versions of ConeXware PowerArchiver prior to 20.10.02 are affected by this vulnerability, exposing them to the risk of file exfiltration over the network.

Exploitation Mechanism

By crafting malicious XML files or payloads, threat actors can exploit this vulnerability to trigger XXE attacks and exfiltrate sensitive local files over the network.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-28684 and prevent potential security breaches.

Immediate Steps to Take

It is crucial to update ConeXware PowerArchiver to version 20.10.02 or later to patch the vulnerability and prevent the exploitation of XXE attacks leading to file exfiltration.

Long-Term Security Practices

Employing secure coding practices, conducting regular security assessments, and educating users on safe file handling can enhance the overall security posture and reduce the likelihood of similar vulnerabilities.

Patching and Updates

Regularly monitoring for software updates and promptly applying patches released by ConeXware for PowerArchiver can help in bolstering the application's security and mitigating potential risks.