{"answers":{"affected":"It affects 73 products.","exploited":"There is no known exploitation of CVE-2021-3971 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-3971 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-3971 is a medium-severity vulnerability in Lenovo Notebook BIOS, published on 22 Apr 2022. 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-2021-3971 and fix it if it is affected.\n\nWhat it is: CVE-2021-3971 is a medium-severity vulnerability in Lenovo Notebook BIOS, published on 22 Apr 2022. 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-2021-3971 in the wild and no public exploit code.\n\nAffected product: Lenovo Notebook BIOS. 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-2021-3971/ (Markdown: https://insights.sbomify.com/CVE-2021-3971/index.md)","id":"CVE-2021-3971","markdown":"https://insights.sbomify.com/CVE-2021-3971/index.md","name":"CVE-2021-3971","record":{"aliases":["GHSA-v9mm-m35w-j8fm"],"analysis":{"component_type":"hardware_firmware","fix_type":"patch","impacts":["privilege_escalation","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Lenovo Notebook BIOS","requires_auth":"high_privilege","summary":"An attacker with elevated privileges can modify firmware protection regions via NVRAM variables in Lenovo Notebook BIOS due to a leftover manufacturing driver.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"lenovo","cpe":[{"product":"ideapad_3-14ada05_firmware","vendor":"lenovo"},{"product":"ideapad_3-14ada6_firmware","vendor":"lenovo"},{"product":"ideapad_3-14alc6_firmware","vendor":"lenovo"},{"product":"ideapad_3-14are05_firmware","vendor":"lenovo"},{"product":"ideapad_3-14igl05_firmware","vendor":"lenovo"},{"product":"ideapad_3-14iil05_firmware","vendor":"lenovo"},{"product":"ideapad_3-15ada05_firmware","vendor":"lenovo"},{"product":"ideapad_3-15ada6_firmware","vendor":"lenovo"},{"product":"ideapad_3-15alc6_firmware","vendor":"lenovo"},{"product":"ideapad_3-15are05_firmware","vendor":"lenovo"},{"product":"ideapad_3-15igl05_firmware","vendor":"lenovo"},{"product":"ideapad_3-15iil05_firmware","vendor":"lenovo"},{"product":"ideapad_3-17ada05_firmware","vendor":"lenovo"},{"product":"ideapad_3-17ada6_firmware","vendor":"lenovo"},{"product":"ideapad_3-17alc6_firmware","vendor":"lenovo"},{"product":"ideapad_3-17are05_firmware","vendor":"lenovo"},{"product":"ideapad_3-17iil05_firmware","vendor":"lenovo"},{"product":"ideapad_5-15are05_firmware","vendor":"lenovo"},{"product":"ideapad_creator_5-15imh05_firmware","vendor":"lenovo"},{"product":"ideapad_gaming_3-15arh05_firmware","vendor":"lenovo"},{"product":"ideapad_gaming_3-15imh05_firmware","vendor":"lenovo"},{"product":"l3-15itl6_firmware","vendor":"lenovo"},{"product":"l340-15irh_firmware","vendor":"lenovo"},{"product":"l340-15iwl_firmware","vendor":"lenovo"},{"product":"l340-15iwl_touch_firmware","vendor":"lenovo"},{"product":"l340-17irh_firmware","vendor":"lenovo"},{"product":"l340-17iwl_firmware","vendor":"lenovo"},{"product":"legion_5-15ach6_firmware","vendor":"lenovo"},{"product":"legion_5-15ach6a_firmware","vendor":"lenovo"},{"product":"legion_5-15ach6h_firmware","vendor":"lenovo"},{"product":"legion_5-15ith6_firmware","vendor":"lenovo"},{"product":"legion_5-15ith6h_firmware","vendor":"lenovo"},{"product":"legion_5-17ach6_firmware","vendor":"lenovo"},{"product":"legion_5-17ach6h_firmware","vendor":"lenovo"},{"product":"legion_5-17ith6_firmware","vendor":"lenovo"},{"product":"legion_5-17ith6h_firmware","vendor":"lenovo"},{"product":"legion_5_pro-16ach6_firmware","vendor":"lenovo"},{"product":"legion_5_pro-16ach6h_firmware","vendor":"lenovo"},{"product":"legion_5_pro-16ith6_firmware","vendor":"lenovo"},{"product":"legion_5_pro-16ith6h_firmware","vendor":"lenovo"},{"product":"legion_7-16achg6_firmware","vendor":"lenovo"},{"product":"legion_7-16ithg6_firmware","vendor":"lenovo"},{"product":"legion_y540-15irh-pg0_firmware","vendor":"lenovo"},{"product":"legion_y540-15irh_firmware","vendor":"lenovo"},{"product":"legion_y540-17irh-pg0_firmware","vendor":"lenovo"},{"product":"legion_y540-17irh_firmware","vendor":"lenovo"},{"product":"legion_y545-pg0_firmware","vendor":"lenovo"},{"product":"legion_y545_firmware","vendor":"lenovo"},{"product":"legion_y7000-2019-pg0_firmware","vendor":"lenovo"},{"product":"legion_y7000-2019_firmware","vendor":"lenovo"},{"product":"s145-14api_firmware","vendor":"lenovo"},{"product":"s145-14ast_firmware","vendor":"lenovo"},{"product":"s145-14igm_firmware","vendor":"lenovo"},{"product":"s145-14iil_firmware","vendor":"lenovo"},{"product":"s145-15api_firmware","vendor":"lenovo"},{"product":"s145-15ast_firmware","vendor":"lenovo"},{"product":"s145-15igm_firmware","vendor":"lenovo"},{"product":"s145-15iil_firmware","vendor":"lenovo"},{"product":"s540-13api_firmware","vendor":"lenovo"},{"product":"v14-ada_firmware","vendor":"lenovo"},{"product":"v14-are_firmware","vendor":"lenovo"},{"product":"v14-igl_firmware","vendor":"lenovo"},{"product":"v14-iil_firmware","vendor":"lenovo"},{"product":"v140-15iwl_firmware","vendor":"lenovo"},{"product":"v14_g2-acl_firmware","vendor":"lenovo"},{"product":"v15-ada_firmware","vendor":"lenovo"},{"product":"v15-igl_firmware","vendor":"lenovo"},{"product":"v15-iil_firmware","vendor":"lenovo"},{"product":"v15_g2-alc_firmware","vendor":"lenovo"},{"product":"v17-iil_firmware","vendor":"lenovo"},{"product":"v340-17iwl_firmware","vendor":"lenovo"},{"product":"yoga_slim_7_pro-14ach5_d_firmware","vendor":"lenovo"},{"product":"yoga_slim_7_pro-14ach5_od_firmware","vendor":"lenovo"}],"cvss":{"score":6.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-489","name":"Active Debug Code"}],"description":"A potential vulnerability by a driver used during older manufacturing processes on some consumer Lenovo Notebook devices that was mistakenly included in the BIOS image could allow an attacker with elevated privileges to modify firmware protection region by modifying an NVRAM variable.","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":"Privilege escalation in Notebook BIOS","id":"CVE-2021-3971","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"privilege_escalation","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Security feature bypass in Notebook BIOS","id":"CVE-2021-3972"},"packages":[],"prev":{"headline":"Code injection in Notebook BIOS","id":"CVE-2021-3970"},"products":["Notebook BIOS"],"published":"2022-04-22","related":[{"cvss_score":6.7,"headline":"Code injection in Notebook BIOS","id":"CVE-2021-3970","kev_date_added":null,"published":"2022-04-22"},{"cvss_score":6.7,"headline":"Security feature bypass in Notebook BIOS","id":"CVE-2021-3972","kev_date_added":null,"published":"2022-04-22"}],"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":["Lenovo"]},"summary":"An attacker with elevated privileges can modify firmware protection regions via NVRAM variables in Lenovo Notebook BIOS due to a leftover manufacturing driver.","url":"https://insights.sbomify.com/CVE-2021-3971/"}