{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-20852 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20852 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20852 is a medium-severity command injection vulnerability in ELECOM LAN routers, published on 1 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-20852 and fix it if it is affected.\n\nWhat it is: CVE-2021-20852 is a medium-severity command injection vulnerability in ELECOM LAN routers, published on 1 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-20852 in the wild and no public exploit code.\n\nAffected product: ELECOM LAN routers. 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-2021-20852/ (Markdown: https://insights.sbomify.com/CVE-2021-20852/index.md)","id":"CVE-2021-20852","markdown":"https://insights.sbomify.com/CVE-2021-20852/index.md","name":"CVE-2021-20852","record":{"aliases":["GHSA-6pq5-g5mf-96hw"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"ELECOM LAN router","requires_auth":"high_privilege","summary":"A network-adjacent administrator can execute arbitrary OS commands on ELECOM LAN routers due to a buffer overflow vulnerability.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"wrh-733gbk_firmware","vendor":"elecom"},{"product":"wrh-733gwh_firmware","vendor":"elecom"}],"cvss":{"score":6.8,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"Buffer overflow vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a network-adjacent attacker with an administrator privilege to execute an arbitrary OS command via unspecified vectors.","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":"Command injection in ELECOM LAN routers","id":"CVE-2021-20852","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"command_injection","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Command injection in ELECOM LAN routers","id":"CVE-2021-20853"},"packages":[],"prev":{"headline":"Cross-site request forgery in Browser and Operating System Finder","id":"CVE-2021-20851"},"products":["ELECOM LAN routers"],"published":"2021-12-01","related":[{"cvss_score":6.8,"headline":"Command injection in ELECOM LAN routers","id":"CVE-2021-20853","kev_date_added":null,"published":"2021-12-01"},{"cvss_score":6.8,"headline":"Command injection in ELECOM LAN routers","id":"CVE-2021-20854","kev_date_added":null,"published":"2021-12-01"},{"cvss_score":5.4,"headline":"Cross-site scripting in ELECOM LAN routers","id":"CVE-2021-20855","kev_date_added":null,"published":"2021-12-01"},{"cvss_score":5.4,"headline":"Cross-site scripting in ELECOM LAN routers","id":"CVE-2021-20856","kev_date_added":null,"published":"2021-12-01"}],"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":"A network-adjacent administrator can execute arbitrary OS commands on ELECOM LAN routers due to a buffer overflow vulnerability.","url":"https://insights.sbomify.com/CVE-2021-20852/"}