{"answers":{"affected":"It affects 23 products.","exploited":"There is no known exploitation of CVE-2020-7540 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-7540 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-7540 is a critical missing authorization vulnerability in Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), published on 11 Dec 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-2020-7540 and fix it if it is affected.\n\nWhat it is: CVE-2020-7540 is a critical missing authorization vulnerability in Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), published on 11 Dec 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-2020-7540 in the wild and no public exploit code.\n\nAffected product: Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions). 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-2020-7540/ (Markdown: https://insights.sbomify.com/CVE-2020-7540/index.md)","id":"CVE-2020-7540","markdown":"https://insights.sbomify.com/CVE-2020-7540/index.md","name":"CVE-2020-7540","record":{"aliases":["GHSA-x5fh-cqhm-x62g"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Modicon PLC Web Server","requires_auth":"none","summary":"Unauthenticated attackers can execute arbitrary commands on Modicon PLCs via the web server due to missing authentication for critical functions.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"schneider","cpe":[{"product":"140cpu65150_firmware","vendor":"schneider-electric"},{"product":"140cpu65160_firmware","vendor":"schneider-electric"},{"product":"140noc77101_firmware","vendor":"schneider-electric"},{"product":"140noc78000_firmware","vendor":"schneider-electric"},{"product":"140noc78100_firmware","vendor":"schneider-electric"},{"product":"140noe77101_firmware","vendor":"schneider-electric"},{"product":"140noe77111_firmware","vendor":"schneider-electric"},{"product":"bmxnoc0401_firmware","vendor":"schneider-electric"},{"product":"bmxnoe0100_firmware","vendor":"schneider-electric"},{"product":"bmxnoe0110_firmware","vendor":"schneider-electric"},{"product":"bmxnor200h_firmware","vendor":"schneider-electric"},{"product":"modicon_m340_bmxp341000_firmware","vendor":"schneider-electric"},{"product":"modicon_m340_bmxp342000_firmware","vendor":"schneider-electric"},{"product":"modicon_m340_bmxp3420102_firmware","vendor":"schneider-electric"},{"product":"modicon_m340_bmxp3420102cl_firmware","vendor":"schneider-electric"},{"product":"modicon_m340_bmxp342020_firmware","vendor":"schneider-electric"},{"product":"modicon_m340_bmxp3420302_firmware","vendor":"schneider-electric"},{"product":"modicon_m340_bmxp3420302cl_firmware","vendor":"schneider-electric"},{"product":"tsxety4103_firmware","vendor":"schneider-electric"},{"product":"tsxety5103_firmware","vendor":"schneider-electric"},{"product":"tsxp574634_firmware","vendor":"schneider-electric"},{"product":"tsxp575634_firmware","vendor":"schneider-electric"},{"product":"tsxp576634_firmware","vendor":"schneider-electric"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"description":"A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause unauthenticated command execution in the controller when sending special HTTP requests.","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":"Missing authorization in Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)","id":"CVE-2020-7540","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2020"},"n_packages":0,"n_references":1,"next":{"headline":"Information disclosure in Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)","id":"CVE-2020-7541"},"packages":[],"prev":{"headline":"Denial of service in Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)","id":"CVE-2020-7539"},"products":["Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)"],"published":"2020-12-11","related":[{"cvss_score":7.5,"headline":"Information disclosure in Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)","id":"CVE-2021-22785","kev_date_added":null,"published":"2022-02-11"},{"cvss_score":7.5,"headline":"Denial of service in Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)","id":"CVE-2021-22787","kev_date_added":null,"published":"2022-02-11"},{"cvss_score":7.5,"headline":"Memory corruption in Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)","id":"CVE-2021-22788","kev_date_added":null,"published":"2022-02-11"},{"cvss_score":7.5,"headline":"Path traversal in Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)","id":"CVE-2020-7535","kev_date_added":null,"published":"2020-12-11"},{"cvss_score":7.5,"headline":"Denial of service in Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)","id":"CVE-2020-7539","kev_date_added":null,"published":"2020-12-11"},{"cvss_score":7.5,"headline":"Denial of service in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum \u0026 Modicon Premium (see security notifications for affected versions)","id":"CVE-2020-7542","kev_date_added":null,"published":"2020-12-11"}],"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":["n/a"]},"summary":"Unauthenticated attackers can execute arbitrary commands on Modicon PLCs via the web server due to missing authentication for critical functions.","url":"https://insights.sbomify.com/CVE-2020-7540/"}