{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2017-6030 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2017-6030 yet. Limit exposure of the affected software until one is available.","what":"CVE-2017-6030 is a medium-severity vulnerability in Schneider Electric Modicon M221, 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-2017-6030 and fix it if it is affected.\n\nWhat it is: CVE-2017-6030 is a medium-severity vulnerability in Schneider Electric Modicon M221, 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-2017-6030 in the wild and no public exploit code.\n\nAffected product: Schneider Electric Modicon M221. 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-2017-6030/ (Markdown: https://insights.sbomify.com/CVE-2017-6030/index.md)","id":"CVE-2017-6030","markdown":"https://insights.sbomify.com/CVE-2017-6030/index.md","name":"CVE-2017-6030","record":{"aliases":["GHSA-w3r9-mwpj-g2c7"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["security_bypass","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Modicon PLC","requires_auth":"none","summary":"Attackers can predict TCP sequence numbers to spoof or disrupt connections on Schneider Electric Modicon PLCs.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"modicon_m221_firmware","vendor":"schneider-electric"},{"product":"modicon_m241_firmware","vendor":"schneider-electric"},{"product":"modicon_m251_firmware","vendor":"schneider-electric"}],"cvss":{"score":6.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-331","name":"Insufficient Entropy"},{"id":"CWE-343","name":"Predictable Value Range from Previous Values"}],"description":"A predictable value range from previous values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The affected products generate insufficiently random TCP initial sequence numbers that may allow an attacker to predict the numbers from previous values. This may allow an attacker to spoof or disrupt TCP connections.","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 PLCs Predictable Value Range from Previous Values","id":"CVE-2017-6030","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2017"},"n_packages":0,"n_references":3,"next":{"headline":"Code injection in Certec EDV GmbH atvise scada","id":"CVE-2017-6031"},"packages":[],"prev":{"headline":"A Cross-Site Scripting issue was discovered in Certec EDV GmbH atvise scada prior to Version 3.0.","id":"CVE-2017-6029"},"products":["Modicon M221","Modicon M241","Modicon M251"],"published":"2017-06-30","related":[{"cvss_score":9.8,"headline":"Weak cryptography in Modicon M221 (all references, all versions)","id":"CVE-2020-28214","kev_date_added":null,"published":"2020-12-11"},{"cvss_score":9.8,"headline":"Auth bypass in Modicon M221, all references, all versions prior to firmware V1.6.2.0","id":"CVE-2018-7790","kev_date_added":null,"published":"2018-08-29"},{"cvss_score":9.8,"headline":"Auth bypass in Modicon M221, all references, all versions prior to firmware V1.6.2.0","id":"CVE-2018-7791","kev_date_added":null,"published":"2018-08-29"},{"cvss_score":7.5,"headline":"Denial of service in SoMachine Basic and Modicon M221, SoMachine Basic, all versions Modicon M221, all references, all versions prior to firmware V1.10.0.0","id":"CVE-2018-7821","kev_date_added":null,"published":"2019-05-22"},{"cvss_score":7.5,"headline":"Weak cryptography in Modicon M221, all references, all versions prior to firmware V1.6.2.0","id":"CVE-2018-7792","kev_date_added":null,"published":"2018-08-29"},{"cvss_score":7.1,"headline":"Weak cryptography in Modicon M221, all references, all versions","id":"CVE-2020-7565","kev_date_added":null,"published":"2020-11-19"},{"cvss_score":7.1,"headline":"Weak cryptography in Modicon M221, all references, all versions","id":"CVE-2020-7566","kev_date_added":null,"published":"2020-11-19"}],"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":"partial"},"state":"PUBLISHED","updated":"2026-06-04","vendors":["Schneider Electric"]},"summary":"Attackers can predict TCP sequence numbers to spoof or disrupt connections on Schneider Electric Modicon PLCs.","url":"https://insights.sbomify.com/CVE-2017-6030/"}