CVE-2014-5254 in xcfa
Summary
by MITRE
xcfa before 5.0.1 creates temporary files insecurely which could allow local users to launch a symlink attack and overwrite arbitrary files.
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Analysis
by VulDB Data Team • 02/26/2024
The vulnerability identified as CVE-2014-5254 affects the xcfa utility version 5.0.1 and earlier, presenting a significant security risk through insecure temporary file creation practices. This flaw enables local attackers to exploit a symlink attack vector that could result in arbitrary file overwrite operations. The issue stems from the application's failure to properly handle temporary file generation, creating opportunities for malicious users to manipulate the system's file structure through symbolic link manipulation. The vulnerability represents a classic example of insecure temporary file handling that has been documented in various security frameworks and standards.
The technical implementation of this vulnerability resides in the xcfa utility's approach to creating temporary files during its operational execution. When the application generates temporary files, it does not employ proper security measures such as creating files with unique, unpredictable names or using secure file creation primitives. This insecure practice allows local attackers to establish symbolic links with predictable names in the temporary file directory, effectively intercepting the file creation process. The flaw aligns with CWE-377, which specifically addresses insecure temporary file creation, and demonstrates how inadequate file handling can lead to privilege escalation and arbitrary code execution scenarios.
From an operational impact perspective, this vulnerability provides local attackers with the capability to overwrite any file on the system that the xcfa utility has write permissions to. The attack requires the user to have local access to the system, but once exploited, could potentially lead to persistent access, privilege escalation, or data corruption. The vulnerability affects systems where xcfa is installed and executed with elevated privileges, making it particularly dangerous in multi-user environments or when the utility is used in automated processes. Attackers can leverage this weakness to replace critical system files, configuration files, or even executables, potentially compromising the entire system integrity.
Security mitigations for CVE-2014-5254 should focus on upgrading to xcfa version 5.0.1 or later, which contains the necessary fixes for secure temporary file handling. System administrators should also implement proper file system permissions and access controls to limit the potential impact of such vulnerabilities. The fix typically involves implementing secure temporary file creation methods such as using unique filenames, proper file mode settings, and ensuring that temporary files are created in secure directories with appropriate permissions. Additionally, this vulnerability can be addressed through proper input validation and secure coding practices that align with the ATT&CK framework's defensive strategies for preventing privilege escalation and local persistence mechanisms. Organizations should also consider implementing monitoring solutions to detect suspicious file creation patterns and symbolic link manipulation activities that could indicate exploitation attempts.