CVE-2021-42357 : Vulnerability Insights and Analysis
Learn about CVE-2021-42357, a DOM-based XSS vulnerability in Apache Knox, allowing attackers to redirect users to malicious pages. Find mitigation steps and long-term security practices here.
Apache Knox SSO prior to 1.6.1 is prone to a DOM-based XSS vulnerability that allows attackers to redirect users to malicious pages.
Understanding CVE-2021-42357
This CVE describes a vulnerability in Apache Knox that enables a crafted request to redirect users to pages controlled by attackers through improper URL parsing.
What is CVE-2021-42357?
When using Apache Knox SSO before version 1.6.1, attackers can redirect users to malicious pages by manipulating request parameters, leading to potential security risks such as phishing attacks.
The Impact of CVE-2021-42357
Exploitation of this vulnerability could compromise user security by redirecting them to attacker-controlled pages, increasing the risk of phishing and XSS attacks.
Technical Details of CVE-2021-42357
This section delves into the specifics of the vulnerability found in Apache Knox.
Vulnerability Description
The vulnerability in Apache Knox SSO allows an attacker to redirect users to malicious pages through specially crafted request parameters due to improper URL parsing.
Affected Systems and Versions
- Versions affected: Apache Knox 1.x prior to 1.6.1, Apache Knox 0.x up to version 0.12.0
Exploitation Mechanism
- Attackers can exploit this vulnerability by crafting requests with malicious parameters to redirect users outside regular flows through XSS or phishing campaigns.
Mitigation and Prevention
Learn how to mitigate the risks associated with CVE-2021-42357.
Immediate Steps to Take
- Users of Apache Knox 1.x should upgrade to version 1.6.1 to address this vulnerability.
- Unsupported versions like 0.13.0, 0.14.0 of the 0.x line are also affected and should upgrade to 1.6.1.
- Unsupported versions 1.0.0 and 1.1.0, although not mentioned, should also upgrade to 1.6.1 for security.
Long-Term Security Practices
- Regularly update software to the latest supported versions.
- Educate users on phishing and XSS risk awareness to prevent future exploits.
Patching and Updates
Ensure all systems are patched with the latest security updates to prevent vulnerabilities like the one described in CVE-2021-42357.