CVE-2015-7945 in Ganeti
Summary
by MITRE
The RESTful control interface (aka RAPI or ganeti-rapi) in Ganeti before 2.9.7, 2.10.x before 2.10.8, 2.11.x before 2.11.8, 2.12.x before 2.12.6, 2.13.x before 2.13.3, 2.14.x before 2.14.2, and 2.15.x before 2.15.2 allows remote attackers to obtain the DRBD secret via instance information job results.
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Analysis
by VulDB Data Team • 12/19/2024
The vulnerability described in CVE-2015-7945 affects the RESTful control interface of Ganeti, a cluster virtualization management software that provides centralized management for virtual machines across multiple nodes. This interface, known as RAPI or ganeti-rapi, serves as a critical communication channel for administrators to interact with the Ganeti cluster. The flaw exists in multiple versions of Ganeti spanning from 2.9.7 through 2.15.2, with specific patches released for each affected major version. The vulnerability represents a significant security weakness that allows unauthenticated remote attackers to extract sensitive information from the system.
The technical flaw resides in how the RAPI interface handles instance information job results, specifically in the way it processes and returns data about virtual machine configurations. When certain instance information queries are made through the RESTful interface, the system inadvertently includes the DRBD (Distributed Replicated Block Device) secret within the job results. DRBD secrets are cryptographic keys used to secure replication between cluster nodes and are essential for maintaining data integrity and confidentiality in distributed virtualization environments. This exposure occurs because the interface does not properly sanitize or filter the output data before returning it to requesting clients, creating an information disclosure vulnerability.
The operational impact of this vulnerability is severe for organizations running Ganeti clusters, as the DRBD secret provides attackers with the means to compromise data replication security between cluster nodes. An attacker who can obtain this secret gains the ability to perform unauthorized data replication operations, potentially leading to data corruption, unauthorized access to replicated data, or even complete compromise of the virtualization cluster. The vulnerability affects all versions where the RAPI interface is enabled and accessible, making it particularly dangerous in environments where remote access is permitted. This issue directly violates security principles by exposing credentials and cryptographic keys through unintended data channels, potentially enabling further attacks such as privilege escalation or lateral movement within the cluster.
Organizations should immediately implement mitigations including applying the vendor patches released for each affected version, restricting access to the RAPI interface through network segmentation and firewall rules, and implementing proper access controls to limit who can query instance information. The vulnerability aligns with CWE-200 (Information Exposure) and can be categorized under ATT&CK technique T1083 (File and Directory Discovery) and T1552 (Unsecured Credentials) in threat modeling frameworks. Additionally, organizations should consider implementing network monitoring to detect unusual patterns in RAPI access and establish proper audit logging for all RAPI operations. The exposure of DRBD secrets through this vulnerability demonstrates the critical importance of proper input sanitization and output filtering in web-based interfaces, particularly those handling sensitive operational data in distributed systems environments.