CVE-2023-42683 in SC7731E
Summary
by MITRE • 12/04/2023
In gsp driver, there is a possible out of bounds read 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-2023-42683 resides within the graphics streaming protocol driver component, representing a critical out-of-bounds read flaw that stems from inadequate input validation mechanisms. This issue manifests when the gsp driver fails to perform proper bounds checking on data structures, specifically affecting how it processes incoming graphical data streams. The missing validation allows malicious inputs to potentially traverse memory boundaries, creating an exploitable condition that could be leveraged by attackers with system execution privileges. The vulnerability's classification as a local denial of service indicates that exploitation requires prior access to system-level execution capabilities, typically achieved through privilege escalation or legitimate system access. This prerequisite aligns with attack patterns documented in the attack chain where initial access is established before executing more sophisticated exploitation techniques.
The technical implementation of this flaw involves the driver's handling of graphical data packets that contain metadata specifying buffer sizes and memory offsets. When these parameters are not properly validated against expected ranges, the driver's memory access routines can reference memory locations beyond the allocated buffer boundaries. This condition creates a scenario where the system attempts to read data from unauthorized memory regions, potentially causing system instability, application crashes, or complete system hangs. The out-of-bounds read operation can also expose sensitive information from adjacent memory locations, though the primary impact remains focused on denial of service conditions. This vulnerability type maps directly to CWE-129, which describes improper validation of array indices, and represents a classic example of memory safety issues that have plagued driver-level software for decades. The attack surface is particularly concerning as graphics drivers operate with high privileges and interact directly with hardware components, making them attractive targets for attackers seeking persistent system compromise.
The operational impact of this vulnerability extends beyond simple service disruption, as it can effectively disable critical graphical processing capabilities within affected systems. When exploited, the out-of-bounds read can cause the gsp driver to crash or become unresponsive, leading to complete loss of graphical functionality and potentially requiring system reboots to restore normal operations. This disruption affects not only user experience but also enterprise environments where graphical processing is critical for applications, virtual desktop infrastructure, and remote desktop services. The requirement for system execution privileges to exploit this vulnerability means that it cannot be leveraged remotely without prior compromise, but once achieved, the impact can be severe for organizations relying on stable graphical processing capabilities. The vulnerability's presence in the gsp driver component suggests it affects systems utilizing graphics streaming protocols, particularly those implementing proprietary or specialized graphics processing frameworks. This type of vulnerability is often categorized under the MITRE ATT&CK framework's privilege escalation and defense evasion tactics, where attackers may use such flaws to maintain persistent access or hide their activities within legitimate system processes.
Mitigation strategies for CVE-2023-42683 should focus on immediate patch deployment from the vendor, as the flaw represents a fundamental security issue that requires code-level corrections. System administrators should prioritize patching affected systems, particularly those running graphics-intensive applications or virtualization platforms that rely heavily on gsp driver functionality. Additionally, implementing runtime protections such as address space layout randomization and stack canaries can help mitigate exploitation attempts even if patches are not immediately available. Network segmentation and privilege reduction measures should be enforced to limit potential attack vectors, as the vulnerability requires system execution privileges to exploit effectively. Organizations should also implement monitoring for unusual driver behavior or system crashes that might indicate exploitation attempts. The remediation process should include thorough testing of patches in controlled environments before widespread deployment to ensure compatibility with existing graphics workloads and applications. Regular vulnerability assessments and security audits of graphics driver components should be conducted to identify similar issues before they can be exploited by attackers. This vulnerability highlights the importance of rigorous input validation and bounds checking in driver-level software development, emphasizing the need for adherence to secure coding practices and regular security reviews of critical system components.