CVE-2012-5561 in Web Application Firewall
Summary
by MITRE
script/katello-generate-passphrase in Katello 1.1 uses world-readable permissions for /etc/katello/secure/passphrase, which allows local users to obtain the passphrase by reading the file.
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Analysis
by VulDB Data Team • 03/22/2021
The vulnerability described in CVE-2012-5561 represents a critical security flaw in the Katello 1.1 content management system where the script katello-generate-passphrase creates a sensitive configuration file with inadequate file permissions. This issue stems from the improper handling of file system permissions during the generation of cryptographic passphrases used for securing Katello's operational components. The script creates the file /etc/katello/secure/passphrase with world-readable permissions, meaning any local user on the system can access this file through standard file reading operations without requiring elevated privileges or authentication credentials.
This vulnerability directly relates to CWE-732, which addresses improper permission assignment for critical resources, and exposes a fundamental flaw in the principle of least privilege within the Katello system. The compromised passphrase file contains cryptographic keys or passwords that are essential for maintaining the integrity and confidentiality of the content management system's operations. Attackers with local access can exploit this weakness to gain unauthorized access to sensitive system components, potentially leading to privilege escalation, data theft, or complete system compromise. The vulnerability is particularly dangerous because it requires no special privileges beyond basic local user access, making it accessible to any user who can execute commands on the affected system.
The operational impact of this vulnerability extends beyond simple information disclosure, as the compromised passphrase could enable attackers to decrypt sensitive data, impersonate legitimate system components, or gain access to additional system resources that rely on the passphrase for authentication. This weakness creates a persistent security risk that remains active as long as the system operates with the vulnerable configuration. The attack surface is broadened because local users who may have legitimate system access for administrative tasks could inadvertently expose sensitive information through this misconfiguration, potentially allowing malicious users to leverage compromised accounts for further exploitation.
Mitigation strategies for this vulnerability should focus on immediate file permission correction through the implementation of proper access controls using chmod commands to restrict file access to only authorized system processes and users. The secure passphrase file should be configured with restrictive permissions such as 600 or 640, ensuring that only the owner or specific system users can access the file content. System administrators should implement regular security audits to verify proper file permissions across all sensitive configuration files and establish automated monitoring to detect unauthorized changes to critical system files. Additionally, organizations should consider implementing the principle of least privilege more broadly within their Katello deployments and ensure that all system components follow secure configuration practices as outlined in industry standards such as the CIS Benchmarks for Red Hat Enterprise Linux systems. The vulnerability also highlights the importance of proper input validation and secure coding practices during the development of system administration scripts to prevent similar issues in future releases.