{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-7538 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-7538 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-7538 is a high-severity denial of service vulnerability in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions), published on 19 Nov 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-2020-7538 and fix it if it is affected.\n\nWhat it is: CVE-2020-7538 is a high-severity denial of service vulnerability in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions), published on 19 Nov 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-2020-7538 in the wild and no public exploit code.\n\nAffected product: PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all 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-2020-7538/ (Markdown: https://insights.sbomify.com/CVE-2020-7538/index.md)","id":"CVE-2020-7538","markdown":"https://insights.sbomify.com/CVE-2020-7538/index.md","name":"CVE-2020-7538","record":{"aliases":["GHSA-6xcf-xj69-qm4j"],"analysis":{"component_type":"ics_ot","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"PLC Simulator","requires_auth":"none","summary":"A specially crafted Modbus request can crash the PLC simulator in EcoStruxure Control Expert, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"schneider","cpe":[{"product":"ecostruxure_control_expert","vendor":"schneider-electric"}],"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-754","name":"Improper Check for Unusual or Exceptional Conditions"}],"description":"A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus.","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 PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions)","id":"CVE-2020-7538","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":0,"n_references":1,"next":{"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"},"packages":[],"prev":{"headline":"Denial of service in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum \u0026 Modicon Premium (see security notifications for affected versions)","id":"CVE-2020-7537"},"products":["PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions)"],"published":"2020-11-19","related":[{"cvss_score":9.8,"headline":"Auth bypass in EcoStruxure Control Expert","id":"CVE-2022-37300","kev_date_added":null,"published":"2022-09-12"},{"cvss_score":9.8,"headline":"Auth bypass in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions)","id":"CVE-2020-28212","kev_date_added":null,"published":"2020-11-19"},{"cvss_score":9.8,"headline":"Code injection in EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20), Modicon M580 (all versions prior to V3.10)","id":"CVE-2020-7475","kev_date_added":null,"published":"2020-03-23"},{"cvss_score":8.8,"headline":"Other in EcoStruxure Control Expert","id":"CVE-2023-27976","kev_date_added":null,"published":"2023-04-18"},{"cvss_score":8.8,"headline":"Code injection in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions)","id":"CVE-2020-28213","kev_date_added":null,"published":"2020-11-19"},{"cvss_score":8.6,"headline":"Memory corruption in EcoStruxure™ Control Expert (all versions) and Unity Pro (former name of EcoStruxure™ Control Expert) (all versions)","id":"CVE-2020-7560","kev_date_added":null,"published":"2020-12-11"},{"cvss_score":8.1,"headline":"Other in EcoStruxure Control Expert","id":"CVE-2023-6408","kev_date_added":null,"published":"2024-02-14"}],"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":"A specially crafted Modbus request can crash the PLC simulator in EcoStruxure Control Expert, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2020-7538/"}