{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2017-6034 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2017-6034 yet. Limit exposure of the affected software until one is available.","what":"CVE-2017-6034 is a critical authentication bypass vulnerability in Schneider Electric Modicon Modbus Protocol, published on 30 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2017-6034 and fix it if it is affected.\n\nWhat it is: CVE-2017-6034 is a critical authentication bypass vulnerability in Schneider Electric Modicon Modbus Protocol, published on 30 Jun 2017. 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-2017-6034 in the wild and no public exploit code.\n\nAffected product: Schneider Electric Modicon Modbus Protocol. 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-2017-6034/ (Markdown: https://insights.sbomify.com/CVE-2017-6034/index.md)","id":"CVE-2017-6034","markdown":"https://insights.sbomify.com/CVE-2017-6034/index.md","name":"CVE-2017-6034","record":{"aliases":["GHSA-m8hv-35c9-8jrx"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["privilege_escalation","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Modicon PLC","requires_auth":"none","summary":"Attackers can bypass authentication by replaying cleartext Modbus commands to control PLC operations like run, stop, upload, and download.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"modbus_firmware","vendor":"schneider-electric"}],"cvss":{"score":9.8,"severity":"critical","source":"cisa-adp","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-287","name":"Improper Authentication"},{"id":"CWE-294","name":"Authentication Bypass by Capture-replay"}],"description":"An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.","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":"Schneider Electric Modicon Modbus Protocol Authentication Bypass by Capture-replay","id":"CVE-2017-6034","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2017"},"n_packages":0,"n_references":4,"next":{"headline":"Memory corruption in Wecon Technologies LEVI Studio HMI Editor","id":"CVE-2017-6035"},"packages":[],"prev":{"headline":"Other in Schneider Electric Interactive Graphical SCADA System Software","id":"CVE-2017-6033"},"products":["Modicon Modbus Protocol"],"published":"2017-06-30","related":[{"cvss_score":5.3,"headline":"Security feature bypass in Schneider Electric Modicon Modbus Protocol","id":"CVE-2017-6032","kev_date_added":null,"published":"2017-06-30"}],"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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-04","vendors":["Schneider Electric"]},"summary":"Attackers can bypass authentication by replaying cleartext Modbus commands to control PLC operations like run, stop, upload, and download.","url":"https://insights.sbomify.com/CVE-2017-6034/"}