CVE-2025-4002 in RefindPlus
Summary
by MITRE • 04/28/2025
A vulnerability was found in RefindPlusRepo RefindPlus 0.14.2.AB and classified as problematic. Affected by this issue is the function GetDebugLogFile of the file Library/MemLogLib/BootLog.c. The manipulation leads to null pointer dereference. Attacking locally is a requirement. The patch is identified as d2143a1e2deefddd9b105fb7160763c4f8d47ea2. It is recommended to apply a patch to fix this issue.
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Analysis
by VulDB Data Team • 04/28/2025
The vulnerability identified as CVE-2025-4002 represents a critical null pointer dereference flaw within the RefindPlus repository version 0.14.2.AB. This issue specifically impacts the GetDebugLogFile function located in Library/MemLogLib/BootLog.c, which serves as a crucial component in the system's logging infrastructure. The vulnerability arises from inadequate input validation and error handling within the memory logging library, creating a scenario where a null pointer reference can occur during normal operational conditions. The attack vector requires local system access, indicating that exploitation would necessitate physical presence or administrative privileges, though this limitation does not diminish the severity of the potential impact. This type of vulnerability falls under CWE-476 which specifically addresses null pointer dereference conditions that can lead to system instability and potential privilege escalation scenarios.
The technical implementation of this flaw demonstrates a classic programming error where the function fails to properly validate pointer references before attempting to access memory locations. When the GetDebugLogFile function processes certain input parameters or system states, it may attempt to dereference a pointer that has not been properly initialized or has been set to null. This condition typically occurs in boot-time logging systems where memory allocation and pointer management become critical during system initialization phases. The null pointer dereference can result in immediate system termination, crash loops, or more subtle instability that may persist and affect system reliability. The patch identified as d2143a1e2deefddd9b105fb7160763c4f8d47ea2 addresses this by implementing proper null pointer checks before any memory access operations, ensuring that the function validates all pointer references before proceeding with subsequent operations.
From an operational security perspective, this vulnerability poses significant risks to systems relying on RefindPlus for boot management and logging capabilities. The local attack requirement does not eliminate the threat potential, as compromised local accounts or physical access scenarios can lead to system-wide instability and potential denial of service conditions. The impact extends beyond simple system crashes, as memory logging systems often serve as critical diagnostic tools during boot processes and system troubleshooting. In enterprise environments, this vulnerability could enable attackers with local access to disrupt boot processes, potentially affecting system availability and integrity. The vulnerability aligns with ATT&CK technique T1068 which covers local privilege escalation and system compromise through kernel or system-level vulnerabilities, though the specific nature of this flaw limits its exploitation scope to local environments. Organizations should consider this vulnerability as part of their broader security posture assessment, particularly in environments where physical security controls may be insufficient.
The remediation approach recommended through the provided patch demonstrates proper defensive programming practices that align with industry standards for secure software development. The patch implementation likely involves adding conditional checks before pointer dereference operations, ensuring that all function parameters and internal references are validated before memory access. This approach prevents the system from attempting to access invalid memory locations while maintaining the intended functionality of the logging system. Security teams should prioritize applying this patch across all affected systems, particularly those running RefindPlus 0.14.2.AB or earlier versions, as the vulnerability exists in the core boot logging functionality. The patch methodology should be integrated into standard security update procedures, with thorough testing to ensure that the fix does not introduce regressions in the logging capabilities or system boot processes. Regular vulnerability assessments should include verification of the patch status to maintain system integrity and prevent potential exploitation scenarios that could compromise system availability and operational continuity.