Learn about CVE-2021-21377, an open redirect vulnerability in OMERO.web before version 5.9.0. Explore the impact, technical details, and mitigation steps to secure your systems.
OMERO.web before version 5.9.0 is affected by an open redirect vulnerability that allows redirection to untrusted sites after login or group context switching. This article provides insights into the impact, technical details, and mitigation steps for CVE-2021-21377.
Understanding CVE-2021-21377
This section delves into the details of the open redirect vulnerability in OMERO.web.
What is CVE-2021-21377?
OMERO.web, an open-source Django-based software for managing microscopy imaging, is susceptible to open redirection to untrusted sites before version 5.9.0. The lack of URL validation allows malicious redirection post-login or group context changes.
The Impact of CVE-2021-21377
The CVSSv3.1 base score of 4.8 categorizes the severity as medium, with high confidentiality impact. Attackers can leverage this vulnerability for phishing attacks and spreading malware.
Technical Details of CVE-2021-21377
This section outlines specific technical aspects of the vulnerability.
Vulnerability Description
OMERO.web versions prior to 5.9.0 lack URL validation, enabling attackers to redirect users to malicious sites after login or group context alterations.
Affected Systems and Versions
OMERO.web versions below 5.9.0 are impacted by this vulnerability, making them vulnerable to open redirect exploitation.
Exploitation Mechanism
By manipulating URLs, threat actors can craft malicious links that abuse the lack of validation in OMERO.web, tricking users into visiting malicious sites.
Mitigation and Prevention
Protecting systems from CVE-2021-21377 involves immediate actions and long-term security practices.
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates
Regularly update and patch software to address known vulnerabilities and enhance overall system security.