{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-20487 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20487 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20487 is a high-severity vulnerability in IBM Power 9 Systems, published on 26 May 2021. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-20487 and fix it if it is affected.\n\nWhat it is: CVE-2021-20487 is a high-severity vulnerability in IBM Power 9 Systems, published on 26 May 2021. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-20487 in the wild and no public exploit code.\n\nAffected product: IBM Power 9 Systems. 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-2021-20487/ (Markdown: https://insights.sbomify.com/CVE-2021-20487/index.md)","id":"CVE-2021-20487","markdown":"https://insights.sbomify.com/CVE-2021-20487/index.md","name":"CVE-2021-20487","record":{"aliases":["GHSA-gwjp-78rh-pcgc"],"analysis":{"component_type":"hardware_firmware","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"IBM Power9 firmware","requires_auth":"high_privilege","summary":"Privileged users can bypass firmware signature verification to inject malicious code into IBM Power9 host firmware, compromising system integrity.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"ibm","cpe":[{"product":"power9_system_firmware","vendor":"ibm"},{"product":"scale-out_lc_system_firmware","vendor":"ibm"}],"cvss":{"score":8,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:N/UI:N/I:H/AC:H/PR:H/S:C/A:H/C:H/E:U/RL:O/RC:C","version":"3.0"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"IBM Power9 Self Boot Engine(SBE) could allow a privileged user to inject malicious code and compromise the integrity of the host firmware bypassing the host firmware signature verification process.","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 Power 9 Systems","id":"CVE-2021-20487","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":"Privilege escalation in Security Identity Manager","id":"CVE-2021-20488"},"packages":[],"prev":{"headline":"Information disclosure in Cloud Pak for Data","id":"CVE-2021-20486"},"products":["Power 9 Systems"],"published":"2021-05-26","related":[],"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":"2024-09-16","vendors":["IBM"]},"summary":"Privileged users can bypass firmware signature verification to inject malicious code into IBM Power9 host firmware, compromising system integrity.","url":"https://insights.sbomify.com/CVE-2021-20487/"}