CVE-2012-4430 in Bacula
Summary
by MITRE
The dump_resource function in dird/dird_conf.c in Bacula before 5.2.11 does not properly enforce ACL rules, which allows remote authenticated users to obtain resource dump information via unspecified vectors.
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Analysis
by VulDB Data Team • 12/19/2021
The vulnerability identified as CVE-2012-4430 resides within the Bacula backup software ecosystem, specifically in the director daemon component known as dird. This flaw manifests in the dump_resource function located in the dird/dird_conf.c source file, representing a critical access control weakness that undermines the integrity of Bacula's security model. The issue affects versions prior to 5.2.11, making it a significant concern for organizations running outdated Bacula installations. The vulnerability's impact extends beyond simple information disclosure, as it fundamentally compromises the access control mechanisms that protect sensitive configuration data within the backup infrastructure.
The technical nature of this vulnerability stems from improper enforcement of Access Control List (ACL) rules within the Bacula director daemon. When authenticated users interact with the system through legitimate means, the dump_resource function fails to validate whether these users possess sufficient privileges to access specific resource dump information. This represents a classic privilege escalation scenario where legitimate authenticated users can bypass expected security boundaries. The unspecified vectors mentioned in the description suggest that multiple attack pathways exist, potentially including various command sequences or API interactions that could trigger the flawed access control logic. The vulnerability operates at the application layer, exploiting weaknesses in the software's internal authorization mechanisms rather than targeting network protocols or system-level vulnerabilities.
The operational impact of this vulnerability extends significantly beyond simple information disclosure, as it provides attackers with unauthorized access to critical backup configuration data that could reveal sensitive operational details about the backup infrastructure. This information could include backup schedules, resource definitions, user permissions, and potentially other configuration elements that could aid in subsequent attacks. Attackers could leverage this access to understand the backup environment's structure, identify potential attack vectors, and plan more sophisticated breaches. The implications are particularly severe in enterprise environments where Bacula serves as a critical component of data protection strategies, as the compromised information could reveal the organization's backup architecture and operational practices.
Organizations should implement immediate mitigations including upgrading to Bacula version 5.2.11 or later, which contains the necessary patches to address this ACL enforcement flaw. System administrators should also review and tighten existing access controls, ensuring that only authorized personnel have access to backup configuration data. Network segmentation and monitoring should be enhanced to detect unusual access patterns to backup systems. The vulnerability aligns with CWE-284, which addresses improper access control, and relates to ATT&CK technique T1078 for valid accounts and T1566 for credential stuffing, as unauthorized access to backup systems represents a significant compromise of system integrity. Additionally, this issue demonstrates the importance of proper input validation and access control enforcement in security-critical applications, particularly those handling sensitive operational data within enterprise environments.