CVE-2014-5247 in Ganeti
Summary
by MITRE
The _UpgradeBeforeConfigurationChange function in lib/client/gnt_cluster.py in Ganeti 2.10.0 before 2.10.7 and 2.11.0 before 2.11.5 uses world-readable permissions for the configuration backup file, which allows local users to obtain SSL keys, remote API credentials, and other sensitive information by reading the file, related to the upgrade command.
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Analysis
by VulDB Data Team • 03/28/2022
The vulnerability described in CVE-2014-5247 resides within the Ganeti cluster management software, specifically in the _UpgradeBeforeConfigurationChange function located in lib/client/gnt_cluster.py. This flaw affects versions prior to 2.10.7 and 2.11.5, representing a critical security oversight in the software's upgrade process. The vulnerability stems from improper file permission handling during configuration backup operations, creating a persistent security risk that undermines the integrity of the entire cluster management system.
The technical implementation of this vulnerability involves the creation of configuration backup files with world-readable permissions during the upgrade command execution. When Ganeti performs an upgrade operation, it generates backup files containing sensitive configuration data that includes SSL keys used for secure communications between cluster nodes. These backup files are created with insufficient access controls, allowing any local user on the system to read the contents without proper authentication or authorization. This design flaw directly violates security principles of least privilege and proper file access control mechanisms.
The operational impact of this vulnerability is severe and multifaceted, as it provides unauthorized local users with access to critical cryptographic materials and authentication credentials. Attackers who gain local access to a Ganeti cluster node can exploit this vulnerability to extract SSL certificates and private keys that secure cluster communications, potentially enabling man-in-the-middle attacks or unauthorized access to the entire cluster infrastructure. Additionally, the backup files contain remote API credentials that could allow attackers to perform administrative operations on the cluster without proper authentication, effectively compromising the entire system's security posture.
This vulnerability aligns with CWE-732: Incorrect Permission Assignment for Critical Resource, which specifically addresses situations where critical system resources are created with insufficient access controls. The flaw also maps to ATT&CK technique T1552.001: Unsecured Credentials, as it exposes sensitive authentication materials through improper file permissions. Furthermore, it demonstrates characteristics of privilege escalation through information disclosure, as local users can leverage this vulnerability to gain elevated access to cluster management functions.
The recommended mitigation strategy involves upgrading to Ganeti versions 2.10.7 or 2.11.5, which contain the necessary code fixes to properly implement file permissions for backup files. System administrators should also implement additional security controls such as regular permission audits, monitoring for unauthorized file access attempts, and ensuring that all cluster nodes maintain proper file system permissions. Organizations should conduct comprehensive security assessments of their Ganeti installations to identify and remediate similar permission-related issues throughout their infrastructure. Additionally, implementing principle of least privilege for all system accounts and regularly reviewing file access controls can help prevent similar vulnerabilities from occurring in other components of the system.