CVE-2022-33282 in MSM8996AU
Summary
by MITRE • 04/13/2023
Memory corruption in Automotive Multimedia due to integer overflow to buffer overflow during IOCTL calls in video playback.
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Analysis
by VulDB Data Team • 04/13/2023
The vulnerability identified as CVE-2022-33282 represents a critical memory corruption issue within automotive multimedia systems that manifests through integer overflow conditions leading to buffer overflow during input/output control operations. This flaw specifically affects the video playback functionality of automotive infotainment systems, creating a pathway for malicious actors to exploit the system's memory management mechanisms. The vulnerability resides in the kernel-level drivers responsible for handling multimedia operations, where improper bounds checking during IOCTL (input/output control) calls creates opportunities for attackers to manipulate memory structures. The integer overflow occurs when processing video frame data or buffer sizes, causing the system to allocate insufficient memory space for the actual data requirements, thereby enabling attackers to overwrite adjacent memory regions.
The technical implementation of this vulnerability demonstrates a classic integer overflow pattern that transitions into buffer overflow conditions within automotive multimedia processing pipelines. When the system receives video data through IOCTL commands, it performs calculations to determine buffer sizes needed for processing the multimedia content. If these calculations exceed the maximum representable value for the integer type used, the overflow causes the system to allocate a buffer that is significantly smaller than required. This discrepancy allows attackers to inject malicious data that exceeds the allocated buffer boundaries, potentially overwriting critical system structures, function pointers, or control data. The flaw is particularly concerning in automotive environments where multimedia systems are interconnected with vehicle control systems, as it could provide attackers with opportunities to compromise vehicle operations beyond simple entertainment functions.
The operational impact of CVE-2022-33282 extends beyond traditional multimedia playback issues, representing a significant security risk for automotive systems that may be exploited for more severe consequences. Attackers could leverage this vulnerability to execute arbitrary code within the multimedia processing context, potentially gaining elevated privileges within the automotive system's software stack. The automotive industry standard ISO 26262 and cybersecurity frameworks such as ISO/SAE 21434 highlight the critical importance of securing automotive software components, particularly those handling multimedia content that may be exposed to external inputs. This vulnerability directly impacts the automotive system's integrity and availability, as successful exploitation could lead to denial of service conditions or unauthorized access to vehicle systems. The flaw's presence in automotive multimedia systems also raises concerns about supply chain security, as many vehicle manufacturers rely on third-party multimedia components that may contain similar vulnerabilities.
Mitigation strategies for CVE-2022-33282 should focus on implementing robust input validation and bounds checking mechanisms within the multimedia processing drivers. System administrators and automotive security teams should prioritize updating affected automotive multimedia systems with patches that address the integer overflow conditions in IOCTL handling routines. The implementation of address space layout randomization ASLR and stack canaries can provide additional protection layers against exploitation attempts. Organizations should also consider implementing network segmentation and access controls for automotive multimedia systems to limit potential attack vectors. According to the MITRE ATT&CK framework, this vulnerability would be categorized under T1059.007 for system commands and T1566 for phishing, as attackers may attempt to leverage the multimedia system as an initial access point for broader system compromise. Regular security assessments and penetration testing of automotive multimedia systems should include specific evaluation of IOCTL handling and memory management functions to identify similar vulnerabilities within the automotive software ecosystem.