{"answers":{"affected":"It affects 27 products.","exploited":"There is no known exploitation of CVE-2021-3128 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-3128 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-3128 is a high-severity denial of service vulnerability in n/a, published on 12 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3128 and fix it if it is affected.\n\nWhat it is: CVE-2021-3128 is a high-severity denial of service vulnerability in n/a, published on 12 Apr 2021. 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-2021-3128 in the wild and no public exploit code.\n\nAffected product: n/a. 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-2021-3128/ (Markdown: https://insights.sbomify.com/CVE-2021-3128/index.md)","id":"CVE-2021-3128","markdown":"https://insights.sbomify.com/CVE-2021-3128/index.md","name":"CVE-2021-3128","record":{"aliases":["GHSA-289v-jmv7-6xmx"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"ASUS router firmware","requires_auth":"none","summary":"Attackers can trigger routing loops in ASUS routers using IPv6, causing excessive network traffic and potential service disruption.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"rt-ac1750_b1_firmware","vendor":"asus"},{"product":"rt-ac1900_firmware","vendor":"asus"},{"product":"rt-ac1900p_firmware","vendor":"asus"},{"product":"rt-ac1900u_firmware","vendor":"asus"},{"product":"rt-ac2900_firmware","vendor":"asus"},{"product":"rt-ac3100_firmware","vendor":"asus"},{"product":"rt-ac5300_firmware","vendor":"asus"},{"product":"rt-ac58u_firmware","vendor":"asus"},{"product":"rt-ac65u_firmware","vendor":"asus"},{"product":"rt-ac66u_b1_firmware","vendor":"asus"},{"product":"rt-ac68p_firmware","vendor":"asus"},{"product":"rt-ac68r_firmware","vendor":"asus"},{"product":"rt-ac68rw_firmware","vendor":"asus"},{"product":"rt-ac68u_firmware","vendor":"asus"},{"product":"rt-ac68w_firmware","vendor":"asus"},{"product":"rt-ac85u_firmware","vendor":"asus"},{"product":"rt-ac86u_firmware","vendor":"asus"},{"product":"rt-ac88u_firmware","vendor":"asus"},{"product":"rt-ax3000_firmware","vendor":"asus"},{"product":"rt-ax55_firmware","vendor":"asus"},{"product":"rt-ax56u_firmware","vendor":"asus"},{"product":"rt-ax58u_firmware","vendor":"asus"},{"product":"rt-ax68u_firmware","vendor":"asus"},{"product":"rt-ax82u_firmware","vendor":"asus"},{"product":"rt-ax86u_firmware","vendor":"asus"},{"product":"rt-ax88u_firmware","vendor":"asus"},{"product":"zenwifi_ax_\\(xt8\\)_firmware","vendor":"asus"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-834","name":"Excessive Iteration"}],"description":"In ASUS RT-AX3000, ZenWiFi AX (XT8), RT-AX88U, and other ASUS routers with firmware \u003c 3.0.0.4.386.42095 or \u003c 9.0.0.4.386.41994, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set.","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":"Denial of service in n/a","id":"CVE-2021-3128","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":27,"next":{"headline":"Laravel Ignition File Upload","id":"CVE-2021-3129"},"packages":[],"prev":{"headline":"nats-io/jwt not enforcing checking of Import token permissions","id":"CVE-2021-3127"},"products":["n/a"],"published":"2021-04-12","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":"2024-08-03","vendors":["n/a"]},"summary":"Attackers can trigger routing loops in ASUS routers using IPv6, causing excessive network traffic and potential service disruption.","url":"https://insights.sbomify.com/CVE-2021-3128/"}