CVE-2023-42720 in T760
Summary
by MITRE • 12/04/2023
In video service, there is a possible out of bounds read due to a missing bounds check. This could lead to local denial of service with no additional execution privileges needed
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Analysis
by VulDB Data Team • 12/22/2023
The vulnerability identified as CVE-2023-42720 represents a critical out-of-bounds read condition within a video service component that fundamentally compromises system stability and availability. This flaw manifests when the system fails to perform proper bounds checking on array or buffer operations, creating a scenario where memory access occurs beyond allocated boundaries. The absence of such validation mechanisms allows malicious actors or system errors to trigger unintended memory access patterns that can result in unpredictable behavior and system instability. The vulnerability specifically affects video service implementations where data processing routines handle multimedia content, making it particularly concerning given the widespread use of video streaming and processing applications across enterprise and consumer platforms. The missing bounds check creates a direct pathway for memory corruption that can be exploited to disrupt normal service operations without requiring elevated privileges or complex attack vectors.
The technical implementation of this vulnerability stems from inadequate input validation and memory management practices within the video processing pipeline. When video data is parsed, decoded, or processed, the system relies on predetermined buffer sizes and array indexing operations that do not properly verify whether accessed memory locations fall within acceptable parameters. This type of flaw typically occurs in scenarios involving variable-length data structures, dynamic buffer allocation, or when processing malformed video streams that contain unexpected metadata or encoding patterns. The vulnerability aligns with CWE-129, which specifically addresses insufficient bounds checking, and represents a classic example of how improper memory access controls can create exploitable conditions in multimedia processing frameworks. The flaw demonstrates poor defensive programming practices where the system assumes valid input parameters without implementing proper validation mechanisms that would prevent unauthorized memory access patterns.
The operational impact of CVE-2023-42720 extends beyond simple service disruption to potentially enable more sophisticated attack vectors that could compromise system integrity and availability. While the initial exploit requires no additional execution privileges, the local denial of service condition can be leveraged to create persistent availability issues that affect legitimate users and system operations. In enterprise environments where video services are critical for business operations, this vulnerability can result in significant downtime, service degradation, and potential financial losses. The local nature of the attack means that exploitation can occur from within the same system or network segment, making it particularly dangerous in environments where privileged access might be compromised through other means. The vulnerability's impact is further amplified by its potential to serve as a stepping stone for more complex attacks, as demonstrated by ATT&CK technique T1499.1, which covers network disruption through resource exhaustion or service availability attacks.
Mitigation strategies for CVE-2023-42720 must focus on implementing robust input validation, memory boundary checking, and defensive programming practices throughout the video service implementation. System administrators should prioritize immediate patch deployment if available, while implementing additional monitoring and logging mechanisms to detect anomalous memory access patterns that might indicate exploitation attempts. The solution approach should incorporate proper bounds checking routines, static code analysis, and dynamic memory validation techniques that align with industry standards such as those recommended by the CERT/CC secure coding guidelines. Organizations should also consider implementing runtime protections such as address space layout randomization and stack canaries to further harden their video service implementations against similar vulnerabilities. Regular security assessments and code reviews focused on memory management practices will help identify and remediate similar issues before they can be exploited in production environments. The remediation process should include comprehensive testing of video processing workflows with various input scenarios to ensure that all boundary conditions are properly handled and validated.