CVE-2022-0824 in Webmin
Summary
by MITRE • 03/02/2022
Improper Access Control to Remote Code Execution in GitHub repository webmin/webmin prior to 1.990.
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Analysis
by VulDB Data Team • 09/03/2024
The vulnerability identified as CVE-2022-0824 represents a critical improper access control flaw within the Webmin administrative interface that affects versions prior to 1.990. This issue resides in the GitHub repository webmin/webmin and fundamentally compromises the security model of the application by allowing unauthorized remote code execution. The vulnerability stems from insufficient validation of user permissions and access controls within the webmin framework, creating a pathway for malicious actors to bypass authentication mechanisms and execute arbitrary code on affected systems. This flaw directly violates the principle of least privilege and demonstrates a critical failure in the application's authorization logic.
The technical implementation of this vulnerability occurs through a flaw in the access control validation routines that govern administrative functions within Webmin. Attackers can exploit this weakness by crafting specific requests that circumvent the normal authentication flow, allowing them to access administrative interfaces without proper credentials. The vulnerability specifically affects the remote code execution capabilities within the webmin environment, where authenticated users with limited privileges could potentially escalate their access to full administrative control. This type of flaw typically manifests as a failure in input validation or session management, enabling attackers to manipulate the application's access control mechanisms. The vulnerability aligns with CWE-285, which categorizes improper access control issues, and represents a direct violation of the authorization controls that should protect privileged functions.
The operational impact of CVE-2022-0824 extends beyond simple unauthorized access, as it creates a persistent threat vector for attackers seeking to compromise entire systems. Organizations running vulnerable versions of Webmin face significant risks including complete system takeover, data exfiltration, and potential lateral movement within their network infrastructure. The remote code execution capability means that attackers can deploy malware, establish backdoors, or modify system configurations without requiring physical access or legitimate user credentials. This vulnerability particularly affects web hosting environments and server management systems where Webmin is commonly deployed, creating widespread potential for exploitation across multiple organizations. The threat landscape for this vulnerability is amplified by the fact that many organizations may not regularly update their Webmin installations, leaving them exposed to this persistent threat.
Mitigation strategies for CVE-2022-0824 must prioritize immediate remediation through patching to version 1.990 or later, which addresses the underlying access control flaws. Organizations should implement network segmentation to limit access to Webmin interfaces, enforce strong authentication mechanisms including multi-factor authentication, and conduct regular security assessments of their administrative interfaces. The implementation of web application firewalls and intrusion detection systems can help monitor for exploitation attempts targeting this vulnerability. Security teams should also review and audit existing access controls, implement principle of least privilege enforcement, and establish automated patch management processes to prevent similar vulnerabilities from arising in the future. This vulnerability demonstrates the critical importance of maintaining up-to-date security patches and proper access control implementations, as highlighted by ATT&CK technique T1078 which addresses valid accounts and privilege escalation. Organizations should also consider implementing zero-trust network architectures to reduce the attack surface of administrative interfaces and prevent lateral movement in case of successful exploitation.