{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-22421 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-22421 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-22421 is a high-severity memory corruption vulnerability in JTEKT ELECTRONICS CORPORATION Kostac PLC Programming Software (Former name: Koyo PLC Programming Software), published on 5 Mar 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2023-22421 and fix it if it is affected.\n\nWhat it is: CVE-2023-22421 is a high-severity memory corruption vulnerability in JTEKT ELECTRONICS CORPORATION Kostac PLC Programming Software (Former name: Koyo PLC Programming Software), published on 5 Mar 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2023-22421 in the wild and no public exploit code.\n\nAffected product: JTEKT ELECTRONICS CORPORATION Kostac PLC Programming Software (Former name: Koyo PLC Programming Software). No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2023-22421/ (Markdown: https://insights.sbomify.com/CVE-2023-22421/index.md)","id":"CVE-2023-22421","markdown":"https://insights.sbomify.com/CVE-2023-22421/index.md","name":"CVE-2023-22421","record":{"aliases":["GHSA-773f-mh54-2mhm"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["data_read","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"PLC programming software","requires_auth":"none","summary":"An attacker can trigger an out-of-bounds read by tricking a user into opening a malicious project file, leading to information disclosure or arbitrary code execution.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"kostac_plc_programming_software","vendor":"jtekt"}],"cvss":{"score":7.8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"Out-of-bounds read vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) Version 1.6.9.0 and earlier. The insufficient buffer size for the PLC program instructions leads to out-of-bounds read. As a result, opening a specially crafted project file may lead to information disclosure and/or arbitrary code execution.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Memory corruption in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software)","id":"CVE-2023-22421","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2023"},"n_packages":0,"n_references":3,"next":{"headline":"HTTP profile vulnerability","id":"CVE-2023-22422"},"packages":[],"prev":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority because it is Unused","id":"CVE-2023-22420"},"products":["Kostac PLC Programming Software (Former name: Koyo PLC Programming Software)"],"published":"2023-03-05","related":[{"cvss_score":7.8,"headline":"Memory corruption in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software)","id":"CVE-2023-22419","kev_date_added":null,"published":"2023-03-05"},{"cvss_score":7.8,"headline":"Use after free in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software)","id":"CVE-2023-22424","kev_date_added":null,"published":"2023-03-05"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-03-07","vendors":["JTEKT ELECTRONICS CORPORATION"]},"summary":"An attacker can trigger an out-of-bounds read by tricking a user into opening a malicious project file, leading to information disclosure or arbitrary code execution.","url":"https://insights.sbomify.com/CVE-2023-22421/"}