CVE-2023-42682 in SC7731E
Summary
by MITRE • 12/04/2023
In gsp driver, there is a possible out of bounds write due to a missing 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-2023-42682 resides within the graphics subsystem driver component known as gsp driver, representing a critical security flaw that could potentially compromise system integrity. This issue manifests as a missing bounds check during memory operations, creating an avenue for out-of-bounds write conditions that fundamentally undermine the driver's memory management protocols.
The technical flaw stems from inadequate input validation within the gsp driver's memory handling routines where proper boundary checks are absent during buffer operations. When the driver processes graphics-related commands or data structures, it fails to verify that write operations remain within allocated memory boundaries, allowing malicious actors to potentially overwrite adjacent memory regions. This vulnerability operates at the kernel level within the graphics processing subsystem, making it particularly dangerous as it can be exploited by local attackers with system execution privileges.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it creates potential pathways for privilege escalation and system instability. Local attackers with system execution privileges can leverage this out-of-bounds write condition to corrupt critical driver memory structures, leading to system crashes, unexpected behavior, or potentially more severe consequences depending on the specific memory locations overwritten. The vulnerability's exploitation requires minimal privileges but can result in significant system compromise.
From a cybersecurity perspective, this vulnerability aligns with CWE-787 Out-of-bounds Write, which specifically addresses memory safety issues in software implementations. The ATT&CK framework categorizes this under privilege escalation techniques where adversaries exploit software vulnerabilities to gain elevated system privileges. The gsp driver's role in graphics processing makes this particularly concerning as it often operates with high privileges and handles sensitive graphical data that could be manipulated to trigger the vulnerability.
Mitigation strategies should focus on implementing comprehensive bounds checking mechanisms within the gsp driver codebase, including input validation for all memory operations and proper buffer size verification. System administrators should prioritize applying vendor patches and updates immediately upon availability, while also considering runtime protections such as address space layout randomization and kernel address space protection. Regular security audits of graphics drivers and memory management routines should be conducted to identify similar vulnerabilities, with emphasis on ensuring proper bounds checking throughout all driver components that handle user-supplied data.