CVE-2022-32560 in Server
Summary
by MITRE • 06/14/2022
An issue was discovered in Couchbase Server before 7.0.4. XDCR lacks role checking when changing internal settings.
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Analysis
by VulDB Data Team • 06/14/2022
The vulnerability identified as CVE-2022-32560 affects Couchbase Server versions prior to 7.0.4 and represents a critical authorization flaw within the Cross Data Center Replication (XDCR) functionality. This issue stems from insufficient role-based access control mechanisms that govern administrative operations within the distributed database system. The vulnerability specifically manifests when administrators attempt to modify internal settings through XDCR configurations, creating a potential pathway for unauthorized privilege escalation and system compromise.
The technical implementation flaw resides in the XDCR module's failure to properly validate user roles and permissions when executing administrative commands that modify internal system parameters. This represents a direct violation of the principle of least privilege and demonstrates a classic authorization bypass vulnerability. The flaw allows attackers with minimal privileges to potentially manipulate critical internal configurations that should only be accessible to system administrators or users with elevated permissions. This weakness directly maps to CWE-285, which addresses insufficient authorization in software systems, and aligns with ATT&CK technique T1078.004 for Valid Accounts and privilege escalation tactics.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential system compromise and data integrity violations. Attackers could exploit this flaw to modify internal replication settings, potentially disrupting data synchronization between clusters, creating backdoors, or establishing persistent access points. The vulnerability's severity is amplified by the fact that XDCR operations often involve critical infrastructure components and sensitive data replication mechanisms. Organizations using Couchbase Server in production environments with multiple cluster configurations face significant risk exposure, particularly in scenarios where administrative privileges are distributed across multiple users or where less privileged accounts have access to XDCR management interfaces.
Mitigation strategies for CVE-2022-32560 require immediate patching of affected Couchbase Server installations to version 7.0.4 or later, which includes the necessary authorization checks for XDCR administrative operations. System administrators should also implement strict access controls and role-based permissions within their Couchbase deployments, ensuring that only authorized personnel have access to XDCR management functions. Network segmentation and monitoring of XDCR-related activities can help detect potential exploitation attempts, while regular security audits of administrative access logs should be conducted to identify any unauthorized configuration changes. The vulnerability highlights the importance of comprehensive authorization testing in distributed database systems and underscores the need for continuous security validation of administrative interfaces. Organizations should also consider implementing additional monitoring controls around internal setting modifications and establish incident response procedures specifically tailored to address potential XDCR-based attacks.