{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-20649 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20649 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20649 is a medium-severity vulnerability in ELECOM CO.,LTD. WRC-300FEBK-S, published on 12 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-20649 and fix it if it is affected.\n\nWhat it is: CVE-2021-20649 is a medium-severity vulnerability in ELECOM CO.,LTD. WRC-300FEBK-S, published on 12 Feb 2021. 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-2021-20649 in the wild and no public exploit code.\n\nAffected product: ELECOM CO.,LTD. WRC-300FEBK-S. 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-2021-20649/ (Markdown: https://insights.sbomify.com/CVE-2021-20649/index.md)","id":"CVE-2021-20649","markdown":"https://insights.sbomify.com/CVE-2021-20649/index.md","name":"CVE-2021-20649","record":{"aliases":["GHSA-5244-5vqh-qwmc"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Wireless router","requires_auth":"none","summary":"Improper certificate validation allows man-in-the-middle attackers to execute arbitrary OS commands on the device.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"wrc-300febk-s_firmware","vendor":"elecom"}],"cvss":{"score":4.8,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"ELECOM WRC-300FEBK-S contains an improper certificate validation vulnerability. Via a man-in-the-middle attack, an attacker may alter the communication response. As a result, an arbitrary OS command may be executed on the affected device.","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":"Security feature bypass in WRC-300FEBK-S","id":"CVE-2021-20649","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Cross-site request forgery in NCC-EWF100RMWH2","id":"CVE-2021-20650"},"packages":[],"prev":{"headline":"Command injection in WRC-300FEBK-S","id":"CVE-2021-20648"},"products":["WRC-300FEBK-S"],"published":"2021-02-12","related":[{"cvss_score":6.8,"headline":"Command injection in WRC-300FEBK-S","id":"CVE-2021-20648","kev_date_added":null,"published":"2021-02-12"},{"cvss_score":6.5,"headline":"Cross-site request forgery in WRC-300FEBK-S","id":"CVE-2021-20647","kev_date_added":null,"published":"2021-02-12"}],"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":"2024-08-03","vendors":["ELECOM CO.,LTD."]},"summary":"Improper certificate validation allows man-in-the-middle attackers to execute arbitrary OS commands on the device.","url":"https://insights.sbomify.com/CVE-2021-20649/"}