CVE-2021-23929 : Exploit Details and Defense Strategies

OX App Suite through 7.10.4 is vulnerable to a Cross-Site Scripting (XSS) attack via a crafted Content-Disposition header in an uploaded HTML document. This can be exploited through an ajax/share/<share-token>?delivery=view URI.

Understanding CVE-2021-23929

This CVE involves a security vulnerability in OX App Suite that allows attackers to execute XSS attacks by manipulating the Content-Disposition header in an HTML document.

What is CVE-2021-23929?

CVE-2021-23929 is a security flaw in OX App Suite version up to 7.10.4 that enables Cross-Site Scripting (XSS) attacks when a specially crafted Content-Disposition header is included in an uploaded HTML file.

The Impact of CVE-2021-23929

The impact of this vulnerability is significant as it allows malicious actors to execute scripts in a victim's web browser, potentially leading to unauthorized access, data theft, and other serious consequences.

Technical Details of CVE-2021-23929

In this section, we will delve into the specifics of the vulnerability, including its description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in OX App Suite up to version 7.10.4 arises from improper handling of Content-Disposition headers in uploaded HTML files, leading to XSS attacks via the ajax/share/<share-token>?delivery=view URL.

Affected Systems and Versions

All versions of OX App Suite up to 7.10.4 are affected by this XSS vulnerability when exposed to crafted Content-Disposition headers in uploaded HTML documents.

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading malicious HTML files containing specially crafted Content-Disposition headers to trigger XSS payloads when the file is accessed via the ajax/share/<share-token>?delivery=view URL.

Mitigation and Prevention

To safeguard against CVE-2021-23929, immediate actions and long-term security practices are essential to mitigate the risks associated with this XSS vulnerability.

Immediate Steps to Take

Users and administrators should update OX App Suite to the latest version to patch the security flaw and prevent potential XSS attacks. Additionally, refraining from opening or accessing suspicious HTML files can reduce the risk of exploitation.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security assessments, and educating users about the dangers of opening untrusted documents can enhance overall security posture and protect against XSS vulnerabilities.

Patching and Updates

Regularly checking for security updates and applying patches released by OX App Suite is crucial to ensure that known vulnerabilities, including CVE-2021-23929, are addressed promptly to maintain a secure environment.