CVE-2023-32461 in PowerEdge BIOS
Summary
by MITRE • 09/15/2023
Dell PowerEdge BIOS and Dell Precision BIOS contain a buffer overflow vulnerability. A local malicious user with high privileges could potentially exploit this vulnerability, leading to corrupt memory and potentially escalate privileges.
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Analysis
by VulDB Data Team • 10/12/2023
The vulnerability identified as CVE-2023-32461 affects Dell PowerEdge BIOS and Dell Precision BIOS implementations, representing a critical buffer overflow flaw that resides within the firmware layer of these enterprise computing systems. This vulnerability manifests as a classic buffer overflow condition where insufficient bounds checking occurs during data processing within the BIOS firmware components. The flaw specifically impacts systems that utilize Dell's proprietary BIOS implementations for their server and workstation platforms, creating a significant security risk for organizations relying on these hardware configurations. The vulnerability is particularly concerning because it operates at the firmware level, making it inherently difficult to detect and remediate compared to traditional software-based security issues.
The technical nature of this buffer overflow vulnerability stems from improper input validation mechanisms within the BIOS firmware code that handles user-supplied data or configuration parameters. When legitimate input exceeds the allocated buffer space, the excess data overflows into adjacent memory locations, potentially corrupting critical system data structures or executable code segments. This type of vulnerability maps directly to CWE-121, which describes buffer overflow conditions where data written to a buffer extends beyond the buffer's boundaries. The operational impact extends beyond simple memory corruption, as the vulnerability can be exploited by a local attacker with high privileges to potentially escalate their privileges within the system. This privilege escalation capability represents a significant concern for enterprise environments where BIOS-level access could provide attackers with unprecedented control over critical infrastructure components.
The exploitation of CVE-2023-32461 requires a local malicious user with elevated privileges, typically corresponding to administrative or root-level access within the system's operating environment. This requirement aligns with ATT&CK technique T1068 which covers the exploitation of local privilege escalation vulnerabilities. The attack surface for this vulnerability encompasses systems where the BIOS firmware is accessible through local administrative interfaces or where firmware update processes are not properly secured. Organizations using Dell PowerEdge and Precision systems in mission-critical applications face heightened risk due to the potential for complete system compromise through this vulnerability. The memory corruption effects can manifest in various ways including system instability, unexpected reboots, or more sinisterly, the execution of malicious code with elevated privileges that could persist across system reboots due to the firmware-level nature of the exploit.
Mitigation strategies for CVE-2023-32461 should prioritize immediate firmware updates from Dell, as the vendor has likely released patches addressing this specific buffer overflow condition. System administrators should implement comprehensive firmware inventory management to identify all affected systems and prioritize remediation efforts based on risk assessment. The implementation of firmware integrity monitoring solutions can provide additional detection capabilities for unauthorized firmware modifications that might attempt to exploit this vulnerability. Security teams should also consider implementing network segmentation and access controls to limit local administrative access to critical systems, thereby reducing the attack surface for potential exploitation. Regular vulnerability assessments should include firmware scanning to identify systems running vulnerable BIOS versions, and organizations should establish processes for rapid deployment of security patches across their enterprise infrastructure. The remediation process should also include verification procedures to ensure that the firmware updates have been successfully applied and that no residual vulnerabilities remain within the system's BIOS implementations.