CVE-2021-25267 : Vulnerability Insights and Analysis
Learn about CVE-2021-25267, a security vulnerability in Sophos Firewall allowing privilege escalation through Webadmin. Find out the impact, affected systems, and mitigation steps.
Multiple XSS vulnerabilities in Webadmin allow for privilege escalation from admin to super-admin in Sophos Firewall older than version 19.0 GA.
Understanding CVE-2021-25267
This CVE involves XSS vulnerabilities in Webadmin that can lead to privilege escalation in Sophos Firewall.
What is CVE-2021-25267?
CVE-2021-25267 is a security vulnerability in Sophos Firewall that allows attackers to exploit multiple XSS vulnerabilities in Webadmin to elevate their privileges from admin to super-admin in versions older than 19.0 GA.
The Impact of CVE-2021-25267
The impact of this CVE is considered medium with a base severity rating of 6.8. It poses a high risk to the confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2021-25267
This section covers the vulnerability description, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The vulnerability allows attackers to perform privilege escalation from admin to super-admin through Webadmin due to XSS issues.
Affected Systems and Versions
Sophos Firewall versions older than 19.0 GA are affected by this vulnerability.
Exploitation Mechanism
Attackers can exploit the XSS vulnerabilities in Webadmin to execute malicious scripts and escalate their privileges.
Mitigation and Prevention
In this section, we discuss the immediate steps to take, long-term security practices, and the importance of patching and updates.
Immediate Steps to Take
Users should update Sophos Firewall to version 19.0 GA or newer to mitigate the risk of privilege escalation through Webadmin.
Long-Term Security Practices
Implementing secure coding practices, conducting regular security audits, and educating users about XSS vulnerabilities can help prevent such exploits in the future.
Patching and Updates
Regularly applying security patches and updates from Sophos is crucial to address known vulnerabilities and enhance the overall security posture of the system.