CVE-2004-0394 in Linux
Summary
by MITRE
A "potential" buffer overflow exists in the panic() function in Linux 2.4.x, although it may not be exploitable due to the functionality of panic.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 06/07/2019
The vulnerability identified as CVE-2004-0394 represents a potential buffer overflow condition within the panic() function of the Linux 2.4.x kernel series. This flaw exists in the core kernel functionality responsible for handling critical system errors and fatal failures. The panic() function serves as the kernel's emergency response mechanism when encountering unrecoverable errors, making it a critical component of system stability and security. The buffer overflow condition manifests in the way the function processes error messages and system failure information, potentially allowing for memory corruption when the kernel encounters certain failure scenarios.
The technical nature of this vulnerability stems from inadequate bounds checking within the panic() function's implementation. When the kernel encounters a critical failure, the panic() function is invoked to log error information and potentially initiate system shutdown procedures. The flaw occurs during the processing of error strings or parameters passed to this function, where insufficient validation allows for buffer overruns. This type of vulnerability falls under the CWE-121 category of "Stack-based Buffer Overflow" and aligns with the broader class of memory corruption vulnerabilities that have historically been exploited for privilege escalation and system compromise. The potential impact extends beyond simple memory corruption to include system instability and possible denial of service conditions.
The operational impact of this vulnerability is significant given the critical role of the panic() function in kernel operations. While the description indicates that exploitation may be limited due to the function's inherent behavior, the potential for system instability remains high. When triggered, the buffer overflow could cause the kernel to crash or behave unpredictably, leading to system downtime and potential data loss. The vulnerability affects the Linux 2.4.x kernel series, which was widely deployed in enterprise and server environments during that period, making the potential impact substantial. Attackers could potentially leverage this condition to cause system crashes or, in more sophisticated scenarios, to gain unauthorized access to system resources. The vulnerability's classification under ATT&CK technique T1068 suggests it could be used for privilege escalation or system compromise within kernel contexts.
Mitigation strategies for CVE-2004-0394 focus primarily on system updates and kernel patching. Organizations should immediately upgrade to kernel versions that contain patches addressing this buffer overflow condition, typically found in Linux 2.6.x releases and later. The patching process involves updating the kernel source code to include proper bounds checking and memory validation within the panic() function implementation. System administrators should also implement monitoring solutions to detect potential exploitation attempts or system instability indicators. Additionally, maintaining current kernel versions and applying security patches promptly remains the most effective defense mechanism. The vulnerability serves as a reminder of the critical importance of kernel security and the need for continuous security assessments of core system components. Given that this vulnerability affects the kernel's fundamental error handling mechanisms, comprehensive system hardening measures should include proper kernel configuration, access controls, and intrusion detection systems to prevent unauthorized exploitation attempts.