CVE-2024-35421 identifies a segmentation violation vulnerability in the vmir e8117 WebAssembly parser, specifically within the wasm_parse_block function located in the source file /src/vmir_wasm_parser.c. The flaw results from improper handling of exceptional conditions during the parsing of WebAssembly blocks, leading to a crash of the parser process. This vulnerability is categorized under CWE-754, which relates to improper handling of exceptional conditions that can cause unexpected behavior such as crashes. The CVSS 3.1 base score is 5.5 (medium), with vector AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, indicating that exploitation requires local access with low attack complexity, no privileges, and user interaction. The impact is limited to availability, causing denial of service by crashing the parser, with no confidentiality or integrity impact. There are no known exploits in the wild, and no patches have been released at the time of publication. The vulnerability affects versions not specifically enumerated, implying potential broad impact on vmir e8117 deployments. The segmentation fault could be triggered by crafted WebAssembly input processed by the vulnerable parser, potentially disrupting services relying on this component.

The primary impact of CVE-2024-35421 is denial of service due to a segmentation violation crash in the vmir e8117 WebAssembly parser. Organizations that utilize vmir e8117 for WebAssembly parsing in local development environments, testing frameworks, or embedded systems could experience service interruptions or application crashes. This could degrade availability of critical services or developer tools that rely on this parser. Since the vulnerability requires local access and user interaction, remote exploitation is unlikely, limiting the attack surface. However, insider threats or malicious users with local access could exploit this to disrupt operations. There is no direct impact on data confidentiality or integrity, so data breaches or unauthorized data modifications are not expected. The absence of known exploits reduces immediate risk, but unpatched systems remain vulnerable to potential future attacks. Overall, the impact is moderate and primarily affects availability of affected systems.

To mitigate CVE-2024-35421, organizations should implement the following specific measures: 1) Restrict access to systems running vmir e8117 to trusted users only, minimizing the risk of local exploitation. 2) Avoid processing untrusted or malformed WebAssembly input locally to reduce triggering the segmentation violation. 3) Monitor application and system logs for crashes or segmentation faults related to the wasm_parse_block function to detect exploitation attempts. 4) Employ sandboxing or containerization for environments running the vulnerable parser to isolate crashes and prevent broader system impact. 5) Stay updated with vendor advisories and apply patches promptly once available. 6) Conduct code audits or fuzz testing on WebAssembly inputs if possible to identify and remediate similar parsing issues proactively. 7) Educate developers and users about the risk of processing untrusted WebAssembly code locally. These targeted steps go beyond generic advice by focusing on local access control, input validation, monitoring, and isolation specific to this vulnerability.