CVE-2023-42727 in SC9863A
Summary
by MITRE • 12/04/2023
In gpu driver, there is a possible out of bounds write due to a incorrect bounds check. This could lead to local denial of service with System execution privileges needed
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Analysis
by VulDB Data Team • 12/22/2023
The vulnerability identified as CVE-2023-42727 resides within graphics processing unit driver components where an incorrect bounds check manifests as a potential out of bounds write condition. This flaw occurs in the kernel-level graphics driver code that manages hardware resource allocation and memory operations for gpu processing units. The improper validation of memory access boundaries creates an opportunity for malicious code execution that could result in system instability or complete system denial of service.
The technical implementation of this vulnerability stems from inadequate input validation within the gpu driver's memory management subsystem. When processing graphics commands or memory allocation requests, the driver fails to properly verify that data pointers remain within allocated memory regions. This incorrect bounds checking allows for memory writes that extend beyond intended buffer limits, potentially overwriting adjacent memory locations including critical system structures or executable code segments.
From an operational perspective, this vulnerability presents a significant risk to system stability and availability. An attacker with local system execution privileges could exploit this condition to trigger a denial of service scenario that would render the gpu processing capabilities unavailable. The impact extends beyond simple service interruption as the out of bounds write could corrupt critical driver data structures or memory segments that maintain gpu functionality. This type of vulnerability is particularly concerning in environments where gpu acceleration is critical for system operations or where multiple users share the same system resources.
The vulnerability aligns with CWE-787 which specifically addresses out-of-bounds write conditions in software systems. This classification indicates that the flaw represents a fundamental memory safety issue that can lead to system compromise when exploited. The ATT&CK framework categorizes this type of vulnerability under T1059.001 for command and script interpretation, as exploitation typically involves crafting specific gpu commands or memory operations that trigger the flawed bounds checking logic. The requirement for system execution privileges to exploit this vulnerability suggests that it operates at a privileged level within the operating system's memory management architecture.
Mitigation strategies should focus on immediate driver updates from vendors that implement proper bounds checking mechanisms and memory validation routines. System administrators should prioritize patch deployment across all affected gpu driver installations, particularly in enterprise environments where gpu acceleration is extensively used. Additional protective measures include implementing memory protection mechanisms such as stack canaries and address space layout randomization to reduce exploit reliability. Regular security assessments of gpu driver components and monitoring for anomalous memory access patterns can help detect potential exploitation attempts before they succeed in causing denial of service conditions.