{"answers":{"affected":"It affects 46 products.","exploited":"There is no known exploitation of CVE-2020-5527 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-5527 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-5527 is a high-severity denial of service vulnerability in MELSOFT transmission port (UDP/IP) of multiple Mitsubishi Electric MELSEC series, published on 30 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-5527 and fix it if it is affected.\n\nWhat it is: CVE-2020-5527 is a high-severity denial of service vulnerability in MELSOFT transmission port (UDP/IP) of multiple Mitsubishi Electric MELSEC series, published on 30 Mar 2020. 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-2020-5527 in the wild and no public exploit code.\n\nAffected product: MELSOFT transmission port (UDP/IP) of multiple Mitsubishi Electric MELSEC series. 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-2020-5527/ (Markdown: https://insights.sbomify.com/CVE-2020-5527/index.md)","id":"CVE-2020-5527","markdown":"https://insights.sbomify.com/CVE-2020-5527/index.md","name":"CVE-2020-5527","record":{"aliases":["GHSA-5jq2-477f-97vj"],"analysis":{"component_type":"ics_ot","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Mitsubishi PLC","requires_auth":"none","summary":"Attackers can cause denial of service in Mitsubishi Electric MELSEC PLCs by sending massive data to the MELSOFT transmission port, disrupting industrial operations.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"cr800-q_firmware","vendor":"mitsubishielectric"},{"product":"fx3g_firmware","vendor":"mitsubishielectric"},{"product":"fx3gc_firmware","vendor":"mitsubishielectric"},{"product":"fx3s_firmware","vendor":"mitsubishielectric"},{"product":"fx3u_firmware","vendor":"mitsubishielectric"},{"product":"fx3uc_firmware","vendor":"mitsubishielectric"},{"product":"fx5u_firmware","vendor":"mitsubishielectric"},{"product":"fx5uc_firmware","vendor":"mitsubishielectric"},{"product":"fx5uj_firmware","vendor":"mitsubishielectric"},{"product":"l02cpu-p_firmware","vendor":"mitsubishielectric"},{"product":"l02cpu_firmware","vendor":"mitsubishielectric"},{"product":"l02scpu-p_firmware","vendor":"mitsubishielectric"},{"product":"l02scpu_firmware","vendor":"mitsubishielectric"},{"product":"l06cpu-p_firmware","vendor":"mitsubishielectric"},{"product":"l06cpu_firmware","vendor":"mitsubishielectric"},{"product":"l26cpu-bt_firmware","vendor":"mitsubishielectric"},{"product":"l26cpu-p_firmware","vendor":"mitsubishielectric"},{"product":"l26cpu-pbt_firmware","vendor":"mitsubishielectric"},{"product":"l26cpu_firmware","vendor":"mitsubishielectric"},{"product":"q02phcpu_firmware","vendor":"mitsubishielectric"},{"product":"q06phcpu_firmware","vendor":"mitsubishielectric"},{"product":"q12dccpu-v_firmware","vendor":"mitsubishielectric"},{"product":"q12phcpu_firmware","vendor":"mitsubishielectric"},{"product":"q12prhcpu_firmware","vendor":"mitsubishielectric"},{"product":"q172dscpu_firmware","vendor":"mitsubishielectric"},{"product":"q173dscpu_firmware","vendor":"mitsubishielectric"},{"product":"q173nccpu_firmware","vendor":"mitsubishielectric"},{"product":"q24dhccpu-ls_firmware","vendor":"mitsubishielectric"},{"product":"q24dhccpu-v_firmware","vendor":"mitsubishielectric"},{"product":"q24dhccpu-vg2_firmware","vendor":"mitsubishielectric"},{"product":"q25phcpu_firmware","vendor":"mitsubishielectric"},{"product":"q25prhcpu_firmware","vendor":"mitsubishielectric"},{"product":"q26dhccpu-ls_firmware","vendor":"mitsubishielectric"},{"product":"r00cpu_firmware","vendor":"mitsubishielectric"},{"product":"r01cpu_firmware","vendor":"mitsubishielectric"},{"product":"r02cpu_firmware","vendor":"mitsubishielectric"},{"product":"r04cpu_firmware","vendor":"mitsubishielectric"},{"product":"r04encpu_firmware","vendor":"mitsubishielectric"},{"product":"r08cpu_firmware","vendor":"mitsubishielectric"},{"product":"r08encpu_firmware","vendor":"mitsubishielectric"},{"product":"r120cpu_firmware","vendor":"mitsubishielectric"},{"product":"r120encpu_firmware","vendor":"mitsubishielectric"},{"product":"r16cpu_firmware","vendor":"mitsubishielectric"},{"product":"r16encpu_firmware","vendor":"mitsubishielectric"},{"product":"r32cpu_firmware","vendor":"mitsubishielectric"},{"product":"r32encpu_firmware","vendor":"mitsubishielectric"}],"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-400","name":"Uncontrolled Resource Consumption"}],"description":"When MELSOFT transmission port (UDP/IP) of Mitsubishi Electric MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions) receives massive amount of data via unspecified vectors, resource consumption occurs and the port does not process the data properly. As a result, it may fall into a denial-of-service (DoS) condition. The vendor states this vulnerability only affects Ethernet communication functions.","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":"Denial of service in MELSOFT transmission port (UDP/IP) of multiple Mitsubishi Electric MELSEC series","id":"CVE-2020-5527","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":0,"n_references":2,"next":{"headline":"Cross-site scripting in Movable Type series","id":"CVE-2020-5528"},"packages":[],"prev":{"headline":"Weak cryptography in AWMS Mobile App","id":"CVE-2020-5526"},"products":["MELSOFT transmission port (UDP/IP) of multiple Mitsubishi Electric MELSEC series"],"published":"2020-03-30","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":"2024-08-04","vendors":["Mitsubishi Electric Corporation"]},"summary":"Attackers can cause denial of service in Mitsubishi Electric MELSEC PLCs by sending massive data to the MELSOFT transmission port, disrupting industrial operations.","url":"https://insights.sbomify.com/CVE-2020-5527/"}