CVE-2022-0829 in Webmin
Summary
by MITRE • 03/02/2022
Improper Authorization in GitHub repository webmin/webmin prior to 1.990.
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Analysis
by VulDB Data Team • 03/04/2022
The vulnerability identified as CVE-2022-0829 represents a critical improper authorization flaw within the webmin management interface for github repositories. This issue affects versions of webmin prior to 1.990 and stems from insufficient validation of user permissions during repository access operations. The vulnerability manifests when unauthorized users can bypass authentication mechanisms to perform administrative actions on github repositories through the webmin interface. This flaw directly violates fundamental security principles of access control and privilege management, creating a significant risk for organizations relying on webmin for repository management. The improper authorization condition allows attackers to escalate their privileges and gain unauthorized access to sensitive repository data and configuration settings.
The technical implementation of this vulnerability involves weaknesses in the webmin authorization framework that fails to properly validate user credentials and role-based access controls when processing repository management requests. Attackers can exploit this by crafting malicious requests that circumvent normal authentication flows, potentially enabling them to modify repository configurations, access confidential code repositories, or perform administrative operations without proper authorization. The vulnerability's impact extends beyond simple unauthorized access as it can lead to complete repository compromise, data exfiltration, and potential lateral movement within organizational networks that utilize webmin for github repository management. This type of flaw commonly maps to CWE-285: Improper Authorization within the Common Weakness Enumeration framework, which specifically addresses issues where systems fail to properly enforce access controls.
Operationally, this vulnerability poses severe risks to organizations using webmin for managing github repositories, as it can result in unauthorized code modifications, data breaches, and potential supply chain compromises. The attack surface is particularly concerning given that webmin interfaces are often exposed to external networks or accessible through internal systems, making exploitation more likely. Security teams must consider the potential for this vulnerability to be leveraged in conjunction with other attack vectors, as it provides a persistent backdoor for attackers to maintain access while potentially remaining undetected. The impact is compounded by the fact that repository management interfaces often contain sensitive configuration data, access tokens, and code repositories that could be exploited for further attacks. Organizations should evaluate their current webmin deployments and assess whether they are running vulnerable versions that could be exploited by threat actors.
Mitigation strategies for CVE-2022-0829 should prioritize immediate patching of webmin installations to version 1.990 or later, which contains the necessary authorization fixes. Network segmentation and access control measures should be implemented to restrict direct access to webmin interfaces, particularly those managing github repositories. Organizations should also conduct comprehensive audits of their webmin configurations to ensure proper authentication mechanisms are in place and monitor for suspicious access patterns or unauthorized modifications to repository settings. Additional security controls such as multi-factor authentication, regular privilege reviews, and continuous monitoring of administrative activities should be implemented to reduce the attack surface and detect potential exploitation attempts. The remediation process should include verification that all affected systems have been properly updated and that proper access controls are enforced through the webmin interface for github repository management operations.