CVE-2006-4801 in Toast
Summary
by MITRE
Race condition in Deja Vu, as used in Roxio Toast Titanium 7 and possibly other products, allows local users to execute arbitrary code via temporary files, including dejavu_manual.rb, which are executed with raised privileges.
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Analysis
by VulDB Data Team • 08/04/2018
The vulnerability described in CVE-2006-4801 represents a critical race condition flaw within the Deja Vu component of Roxio Toast Titanium 7, with potential implications for other affected products. This race condition occurs during the handling of temporary files, specifically the dejavu_manual.rb script, which is executed with elevated privileges. The fundamental issue arises from the timing window between when temporary files are created and when they are accessed, creating opportunities for malicious actors to manipulate the system state. The vulnerability exists in the privilege escalation mechanism where temporary files are processed with higher privileges than intended, allowing local users to potentially execute arbitrary code with elevated system rights. This type of vulnerability falls under the category of privilege escalation through insecure temporary file handling, which is commonly associated with CWE-362, the weakness of race conditions in security-critical code sections. The attack vector specifically targets the local user environment where an attacker can exploit the timing gap to substitute legitimate temporary files with malicious counterparts.
The technical implementation of this vulnerability demonstrates a classic race condition scenario where the application creates temporary files without proper synchronization mechanisms or privilege checks. When the dejavu_manual.rb script is executed, it operates with elevated privileges that should normally be restricted to authorized processes only. The race condition allows an attacker to replace the legitimate temporary file with a malicious version between the time the file is created and when it is executed. This process typically involves creating a symbolic link or copying malicious code into the temporary file location, leveraging the fact that the application does not validate the integrity or authenticity of the temporary file before execution. The flaw represents a failure in proper file system security controls and demonstrates the importance of implementing atomic file operations and privilege separation mechanisms. The vulnerability is particularly dangerous because it requires minimal privileges to exploit, as the local user can manipulate temporary files that are meant to be processed with elevated permissions.
The operational impact of CVE-2006-4801 extends beyond simple privilege escalation to potentially enable full system compromise when combined with other attack vectors. Local users who can access the affected system can leverage this vulnerability to execute arbitrary code with the privileges of the running process, which typically includes administrative or system-level access. This capability allows attackers to install malware, modify system files, create persistent backdoors, or escalate their access further within the compromised environment. The vulnerability's exploitation requires local access but provides a significant foothold for attackers to establish more extensive control over the affected system. Security professionals should consider this vulnerability in the context of the broader ATT&CK framework, particularly under privilege escalation techniques where attackers leverage system weaknesses to gain elevated permissions. The impact is compounded by the fact that such vulnerabilities often remain undetected for extended periods, allowing attackers to maintain persistent access while conducting reconnaissance or data exfiltration activities.
Mitigation strategies for CVE-2006-4801 should focus on eliminating the race condition through proper file handling mechanisms and privilege management. Organizations should implement immediate patches from Roxio or equivalent vendors that address the temporary file creation and execution processes. System administrators should ensure that temporary files are created with appropriate permissions and that file integrity checks are performed before execution. The implementation of secure file creation practices, such as using unique temporary file names, proper file permission settings, and atomic file operations, can prevent attackers from substituting legitimate files with malicious versions. Additionally, privilege separation mechanisms should be enforced to ensure that temporary files are processed with the minimum necessary privileges rather than elevated permissions. Security monitoring should include detection of suspicious temporary file activities and unusual privilege escalation attempts. The vulnerability highlights the importance of following secure coding practices and conducting thorough security reviews of file handling operations, particularly those involving temporary file creation and execution with elevated privileges. Organizations should also consider implementing application whitelisting policies to prevent unauthorized code execution and maintain regular vulnerability assessments to identify similar weaknesses in their software ecosystems.