{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-28505 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-28505 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-28505 is a high-severity vulnerability in Arista Networks EOS, published on 14 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-28505 and fix it if it is affected.\n\nWhat it is: CVE-2021-28505 is a high-severity vulnerability in Arista Networks EOS, published on 14 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-28505 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-2021-28505/ (Markdown: https://insights.sbomify.com/CVE-2021-28505/index.md)","id":"CVE-2021-28505","markdown":"https://insights.sbomify.com/CVE-2021-28505/index.md","name":"CVE-2021-28505","record":{"aliases":["GHSA-3p5w-c6fg-w249"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Arista EOS","requires_auth":"none","summary":"Attackers can bypass IP protocol restrictions in access lists containing VXLAN rules on Arista EOS devices, potentially allowing unauthorized traffic.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Arista","cpe":[{"product":"eos","vendor":"arista"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"},{"id":"CWE-284","name":"Improper Access Control"}],"description":"On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.","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 EOS","id":"CVE-2021-28505","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Missing authorization in EOS","id":"CVE-2021-28506"},"packages":[],"prev":{"headline":"Security feature bypass in EOS","id":"CVE-2021-28504"},"products":["EOS"],"published":"2022-04-14","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":"2024-09-16","vendors":["Arista Networks"]},"summary":"Attackers can bypass IP protocol restrictions in access lists containing VXLAN rules on Arista EOS devices, potentially allowing unauthorized traffic.","url":"https://insights.sbomify.com/CVE-2021-28505/"}