{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-28507 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-28507 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-28507 is a medium-severity authentication bypass vulnerability in Arista Networks EOS, published on 14 Jan 2022. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-28507 and fix it if it is affected.\n\nWhat it is: CVE-2021-28507 is a medium-severity authentication bypass vulnerability in Arista Networks EOS, published on 14 Jan 2022. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-28507 in the wild and no public exploit code.\n\nAffected product: Arista Networks EOS. 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-2021-28507/ (Markdown: https://insights.sbomify.com/CVE-2021-28507/index.md)","id":"CVE-2021-28507","markdown":"https://insights.sbomify.com/CVE-2021-28507/index.md","name":"CVE-2021-28507","record":{"aliases":["GHSA-4j73-jx76-fgw8"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Arista EOS","requires_auth":"high_privilege","summary":"Attackers can bypass service ACLs on OpenConfig interfaces in Arista EOS, allowing unauthorized requests to reach the agent.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Arista","cpe":[{"product":"eos","vendor":"arista"}],"cvss":{"score":5.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"An issue has recently been discovered in Arista EOS where, under certain conditions, the service ACL configured for OpenConfig gNOI and OpenConfig RESTCONF might be bypassed, which results in the denied requests being forwarded to the agent.","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 EOS","id":"CVE-2021-28507","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":"TerminAttr streams IPsec sensitive data in clear text to other authorized users in CVP","id":"CVE-2021-28508"},"packages":[],"prev":{"headline":"Missing authorization in EOS","id":"CVE-2021-28506"},"products":["EOS"],"published":"2022-01-14","related":[{"cvss_score":6.9,"headline":"Arista Extensible Operating System Incomplete Comparison with Missing Factors","id":"CVE-2026-7473","kev_date_added":"2026-06-09","published":"2026-06-05"},{"cvss_score":10,"headline":"Privilege escalation in n/a","id":"CVE-2015-8236","kev_date_added":null,"published":"2015-11-19"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2020-10188","kev_date_added":null,"published":"2020-03-06"},{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2017-18017","kev_date_added":null,"published":"2018-01-03"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2017-14491","kev_date_added":null,"published":"2017-10-02"},{"cvss_score":9.3,"headline":"Privilege escalation in Arista EOS","id":"CVE-2023-24509","kev_date_added":null,"published":"2023-04-13"},{"cvss_score":9.3,"headline":"Information disclosure in n/a","id":"CVE-2015-5165","kev_date_added":null,"published":"2015-08-12"}],"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":"2024-09-17","vendors":["Arista Networks"]},"summary":"Attackers can bypass service ACLs on OpenConfig interfaces in Arista EOS, allowing unauthorized requests to reach the agent.","url":"https://insights.sbomify.com/CVE-2021-28507/"}