{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2020-6984 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-6984 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-6984 is a critical vulnerability in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, published on 16 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-2020-6984 and fix it if it is affected.\n\nWhat it is: CVE-2020-6984 is a critical vulnerability in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, published on 16 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-2020-6984 in the wild and no public exploit code.\n\nAffected product: Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior. 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-2020-6984/ (Markdown: https://insights.sbomify.com/CVE-2020-6984/index.md)","id":"CVE-2020-6984","markdown":"https://insights.sbomify.com/CVE-2020-6984/index.md","name":"CVE-2020-6984","record":{"aliases":["GHSA-f7cx-mjqx-2qmw"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"PLC and programming software","requires_auth":"none","summary":"An attacker can discover the cryptographic function protecting passwords in Rockwell MicroLogix controllers and RSLogix software, potentially bypassing authentication.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"micrologix_1100_firmware","vendor":"rockwellautomation"},{"product":"micrologix_1400_a_firmware","vendor":"rockwellautomation"},{"product":"micrologix_1400_b_firmware","vendor":"rockwellautomation"},{"product":"rslogix_500","vendor":"rockwellautomation"}],"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-327","name":"Use of a Broken or Risky Cryptographic Algorithm"}],"description":"Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, The cryptographic function utilized to protect the password in MicroLogix is discoverable.","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":"Weak cryptography in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior","id":"CVE-2020-6984","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2020"},"n_packages":0,"n_references":1,"next":{"headline":"Hardcoded credentials in Moxa PT-7528 series firmware, Version 4.0 or lower, PT-7828 series firmware, Version 3.9 or lower","id":"CVE-2020-6985"},"packages":[],"prev":{"headline":"Hardcoded credentials in Moxa PT-7528 series firmware, Version 4.0 or lower, PT-7828 series firmware, Version 3.9 or lower","id":"CVE-2020-6983"},"products":["Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior"],"published":"2020-03-16","related":[{"cvss_score":9.8,"headline":"Hardcoded credentials in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior","id":"CVE-2020-6990","kev_date_added":null,"published":"2020-03-16"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2015-6490","kev_date_added":null,"published":"2015-10-28"},{"cvss_score":7.5,"headline":"MicroLogix 1100 \u0026 1400 Product Web Server Application Vulnerable to Denial-Of-Service Condition Attack","id":"CVE-2022-3166","kev_date_added":null,"published":"2022-12-16"},{"cvss_score":7.5,"headline":"Denial of service in Rockwell Automation MicroLogix 1100","id":"CVE-2021-33012","kev_date_added":null,"published":"2021-07-09"},{"cvss_score":7.5,"headline":"Information disclosure in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior","id":"CVE-2020-6988","kev_date_added":null,"published":"2020-03-16"},{"cvss_score":7.5,"headline":"Memory corruption in n/a","id":"CVE-2015-6492","kev_date_added":null,"published":"2015-10-28"}],"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":"2026-06-03","vendors":["n/a"]},"summary":"An attacker can discover the cryptographic function protecting passwords in Rockwell MicroLogix controllers and RSLogix software, potentially bypassing authentication.","url":"https://insights.sbomify.com/CVE-2020-6984/"}