CVE-2024-35427 identifies a segmentation violation vulnerability in the vmir tool, a utility used for parsing WebAssembly (WASM) binaries. The flaw resides in the export_function function within the vmir_wasm_parser.c source file, where improper memory handling leads to a segmentation fault. This vulnerability is classified under CWE-754, which relates to improper handling of exceptional conditions, resulting in a crash. The CVSS v3.1 base score is 5.5 (medium severity), with an attack vector of local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The impact is limited to availability (A:H), with no impact on confidentiality or integrity. Exploiting this vulnerability causes the vmir process to crash, leading to denial of service conditions for users relying on this tool for WASM parsing or analysis. No known exploits have been reported in the wild, and no patches have been published at the time of this report. The vulnerability affects unspecified versions of vmir, indicating the need for users to verify their versions and monitor for vendor updates. Given the local attack vector and requirement for user interaction, exploitation scenarios likely involve a user opening or processing a crafted WASM file that triggers the crash. This vulnerability highlights the importance of robust input validation and error handling in parsing libraries, especially those handling complex binary formats like WASM.

The primary impact of CVE-2024-35427 is denial of service due to application crashes when processing malicious or malformed WASM files. Organizations relying on vmir for WebAssembly analysis, security research, or development tooling may experience interruptions in their workflows. Although the vulnerability does not compromise confidentiality or integrity, the loss of availability can delay development, analysis, or automated processing pipelines. In environments where vmir is integrated into larger automated systems or CI/CD pipelines, this could cause cascading failures or require manual intervention. Since exploitation requires local access and user interaction, remote exploitation risk is low, but insider threat or compromised endpoints could leverage this vulnerability. The absence of known exploits reduces immediate risk, but the medium severity score suggests timely remediation is advisable to prevent potential denial of service attacks.

1. Restrict access to systems running vmir to trusted users only, minimizing the risk of malicious WASM files being processed. 2. Avoid opening or processing untrusted or unauthenticated WASM files with vmir until a patch is available. 3. Monitor vendor communications and security advisories for patches or updates addressing CVE-2024-35427 and apply them promptly. 4. Implement input validation and sandboxing around vmir usage to contain potential crashes and prevent impact on critical systems. 5. Consider alternative WASM parsing tools with a strong security track record if immediate patching is not possible. 6. Incorporate automated detection for abnormal vmir crashes in monitoring systems to quickly identify exploitation attempts. 7. Educate users about the risks of processing untrusted WASM files and enforce policies to reduce user interaction with potentially malicious inputs.