{"answers":{"affected":"It affects 22 products.","exploited":"There is no known exploitation of CVE-2021-27477 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27477 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27477 is a high-severity memory corruption vulnerability in JTEKT Corporation TOYOPUC PLC, published on 1 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-27477 and fix it if it is affected.\n\nWhat it is: CVE-2021-27477 is a high-severity memory corruption vulnerability in JTEKT Corporation TOYOPUC PLC, published on 1 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-27477 in the wild and no public exploit code.\n\nAffected product: JTEKT Corporation TOYOPUC PLC. 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-2021-27477/ (Markdown: https://insights.sbomify.com/CVE-2021-27477/index.md)","id":"CVE-2021-27477","markdown":"https://insights.sbomify.com/CVE-2021-27477/index.md","name":"CVE-2021-27477","record":{"aliases":["GHSA-xqpg-rjjg-58q9"],"analysis":{"component_type":"ics_ot","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Industrial PLC","requires_auth":"none","summary":"An attacker can cause a denial of service by sending invalid frames to JTEKT TOYOPUC PLCs, triggering a buffer overflow that stops the CPU.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"2port-efr_firmware","vendor":"jtekt"},{"product":"fl\\/et-t-v2h_firmware","vendor":"jtekt"},{"product":"nano_10gx_firmware","vendor":"jtekt"},{"product":"nano_2et_firmware","vendor":"jtekt"},{"product":"nano_cpu_firmware","vendor":"jtekt"},{"product":"pc10b-p_firmware","vendor":"jtekt"},{"product":"pc10b_firmware","vendor":"jtekt"},{"product":"pc10e_firmware","vendor":"jtekt"},{"product":"pc10g-cpu_firmware","vendor":"jtekt"},{"product":"pc10ge_firmware","vendor":"jtekt"},{"product":"pc10p-dp-io_firmware","vendor":"jtekt"},{"product":"pc10p-dp_firmware","vendor":"jtekt"},{"product":"pc10p_firmware","vendor":"jtekt"},{"product":"pc10pe-16\\/16p_firmware","vendor":"jtekt"},{"product":"pc10pe_firmware","vendor":"jtekt"},{"product":"plus_2p-efr_firmware","vendor":"jtekt"},{"product":"plus_bus-ex_firmware","vendor":"jtekt"},{"product":"plus_cpu_firmware","vendor":"jtekt"},{"product":"plus_efr2_firmware","vendor":"jtekt"},{"product":"plus_efr_firmware","vendor":"jtekt"},{"product":"plus_ex2_firmware","vendor":"jtekt"},{"product":"plus_ex_firmware","vendor":"jtekt"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"When JTEKT Corporation TOYOPUC PLC versions PC10G-CPU, 2PORT-EFR, Plus CPU, Plus EX, Plus EX2, Plus EFR, Plus EFR2, Plus 2P-EFR, PC10P-DP, PC10P-DP-IO, Plus BUS-EX, Nano 10GX, Nano 2ET,PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B,PC10B-P, Nano CPU, PC10P, and PC10GE receive an invalid frame, the outside area of a receive buffer for FL-net are overwritten. As a result, the PLC CPU detects a system error, and the affected products stop.","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 JTEKT Corporation TOYOPUC PLC","id":"CVE-2021-27477","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"EIPStackGroup OpENer Ethernet/IP Incorrect Conversion between Numeric Types","id":"CVE-2021-27478"},"packages":[],"prev":{"headline":"Rockwell Automation FactoryTalk AssetCentre OS Command Injection","id":"CVE-2021-27476"},"products":["JTEKT Corporation TOYOPUC PLC"],"published":"2021-07-01","related":[],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"An attacker can cause a denial of service by sending invalid frames to JTEKT TOYOPUC PLCs, triggering a buffer overflow that stops the CPU.","url":"https://insights.sbomify.com/CVE-2021-27477/"}