CVE-2022-43283 is a vulnerability identified in wasm2c version 1.0.29, specifically involving an abort condition in the CWriter::Write function. wasm2c is a tool that converts WebAssembly (Wasm) binaries into C source code, facilitating integration or analysis in C environments. The vulnerability is characterized by an abort triggered during the write operation, which corresponds to CWE-434 (Unrestricted Upload of File with Dangerous Type). The CVSS v3.1 base score is 5.5 (medium severity), with the vector indicating that the attack requires local access (AV:L), low attack complexity (AC:L), no privileges required (PR:N), but requires user interaction (UI:R). The impact is limited to availability (A:H), with no confidentiality or integrity impact. This suggests that exploitation causes a denial of service (DoS) by aborting the process, potentially disrupting workflows that rely on wasm2c for WebAssembly to C translation. No known exploits are currently reported in the wild, and no patches or vendor advisories are linked, indicating that mitigation may require manual intervention or updates from maintainers. The vulnerability’s scope is local, meaning an attacker must have local access to the system running wasm2c and convince a user to trigger the abort, possibly by supplying crafted input files. Given the nature of wasm2c as a developer or build tool, the threat primarily affects development environments or automated build pipelines that incorporate wasm2c v1.0.29. The abort could interrupt build processes or automated workflows, leading to availability issues in software development lifecycles involving WebAssembly components.

For European organizations, the impact of CVE-2022-43283 is primarily operational rather than data-compromising. Organizations that utilize wasm2c in their development or continuous integration/continuous deployment (CI/CD) pipelines may experience build failures or service interruptions due to the abort triggered by this vulnerability. This could delay software releases or updates involving WebAssembly modules, affecting productivity and potentially delaying time-sensitive projects. Since the vulnerability does not affect confidentiality or integrity, there is no direct risk of data breach or code tampering. However, availability disruptions in critical development environments could indirectly impact business operations, especially for companies heavily invested in WebAssembly technology or embedded systems development. The requirement for local access and user interaction limits the attack surface, reducing the likelihood of widespread exploitation in enterprise environments. Nonetheless, organizations with less controlled developer workstations or shared build servers might be more susceptible to accidental or malicious triggering of this abort condition.

To mitigate CVE-2022-43283, European organizations should: 1) Identify and inventory all instances of wasm2c in their development and build environments, focusing on version 1.0.29. 2) Restrict local access to systems running wasm2c to trusted personnel only, enforcing strict access controls and user authentication. 3) Implement input validation and sanitization for files processed by wasm2c to prevent malformed or malicious inputs that could trigger the abort. 4) Monitor build and compilation logs for unexpected aborts or crashes related to wasm2c and establish alerting mechanisms for such events. 5) Engage with wasm2c maintainers or the open-source community to obtain patches or updated versions that address this vulnerability; if unavailable, consider temporarily replacing wasm2c with alternative tools or workflows. 6) Educate developers and build engineers about the vulnerability and the importance of cautious input handling and system access. 7) Incorporate wasm2c usage into security audits and vulnerability scanning processes to ensure ongoing awareness and timely remediation.