{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-3956 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-3956 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-3956 is a medium-severity authentication bypass vulnerability in Lenovo XClarity Controller (XCC), published on 18 May 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-2021-3956 and fix it if it is affected.\n\nWhat it is: CVE-2021-3956 is a medium-severity authentication bypass vulnerability in Lenovo XClarity Controller (XCC), published on 18 May 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-2021-3956 in the wild and no public exploit code.\n\nAffected product: Lenovo XClarity Controller (XCC). 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-2021-3956/ (Markdown: https://insights.sbomify.com/CVE-2021-3956/index.md)","id":"CVE-2021-3956","markdown":"https://insights.sbomify.com/CVE-2021-3956/index.md","name":"CVE-2021-3956","record":{"aliases":["GHSA-fjvh-mchr-664c"],"analysis":{"component_type":"hardware_firmware","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Lenovo XClarity Controller","requires_auth":"none","summary":"Unauthenticated attackers can view XCC configuration when LDAP authentication is configured with unauthenticated bind support.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"lenovo","cpe":[{"product":"xclarity_controller","vendor":"lenovo"}],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"A read-only authentication bypass vulnerability was reported in the Third Quarter 2021 release of Lenovo XClarity Controller (XCC) firmware affecting XCC devices configured in LDAP Authentication Only Mode and using an LDAP server that supports “unauthenticated bind”, such as Microsoft Active Directory. An unauthenticated user can gain read-only access to XCC in such a configuration, thereby allowing the XCC device configuration to be viewed but not changed. XCC devices configured to use local authentication, LDAP Authentication + Authorization Mode, or LDAP servers that support only “authenticated bind” and/or “anonymous bind” are not affected.","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":"Auth bypass in XClarity Controller (XCC)","id":"CVE-2021-3956","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cross-Site Request Forgery (CSRF) in kevinpapst/kimai2","id":"CVE-2021-3957"},"packages":[],"prev":{"headline":"Cross-site Scripting (XSS) - Stored in django-helpdesk/django-helpdesk","id":"CVE-2021-3950"},"products":["XClarity Controller (XCC)"],"published":"2022-05-18","related":[{"cvss_score":6.5,"headline":"Other in Lenovo XClarity Controller (XCC)","id":"CVE-2019-6187","kev_date_added":null,"published":"2019-11-20"},{"cvss_score":4.8,"headline":"Auth bypass in XClarity Controller (XCC)","id":"CVE-2019-6195","kev_date_added":null,"published":"2020-02-14"},{"cvss_score":4.5,"headline":"Information disclosure in XClarity Controller (XCC)","id":"CVE-2021-3473","kev_date_added":null,"published":"2021-04-13"}],"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":"Unauthenticated attackers can view XCC configuration when LDAP authentication is configured with unauthenticated bind support.","url":"https://insights.sbomify.com/CVE-2021-3956/"}