{"id":25651175,"url":"https://github.com/moften/malformeddnsquerynginx","last_synced_at":"2026-06-15T04:31:14.374Z","repository":{"id":261120310,"uuid":"883329742","full_name":"moften/MalformedDNSQueryNginx","owner":"moften","description":"Malformed DNS Query","archived":false,"fork":false,"pushed_at":"2025-03-06T17:26:13.000Z","size":6,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-11-17T04:09:15.500Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Python","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/moften.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2024-11-04T19:20:29.000Z","updated_at":"2025-03-06T17:26:16.000Z","dependencies_parsed_at":"2025-11-17T04:02:07.282Z","dependency_job_id":null,"html_url":"https://github.com/moften/MalformedDNSQueryNginx","commit_stats":null,"previous_names":["moften/malformeddnsquerynginx"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/moften/MalformedDNSQueryNginx","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/moften%2FMalformedDNSQueryNginx","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/moften%2FMalformedDNSQueryNginx/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/moften%2FMalformedDNSQueryNginx/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/moften%2FMalformedDNSQueryNginx/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/moften","download_url":"https://codeload.github.com/moften/MalformedDNSQueryNginx/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/moften%2FMalformedDNSQueryNginx/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":34348291,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-06-15T02:00:07.085Z","response_time":63,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2025-02-23T16:19:19.959Z","updated_at":"2026-06-15T04:31:14.359Z","avatar_url":"https://github.com/moften.png","language":"Python","funding_links":[],"categories":[],"sub_categories":[],"readme":"# MalformedDNSQueryNginx\n# m10sec@proton.me\nCVE-2021-23017 Malformed DNS Query PoC\n\n\nExplanation of PoC:\n\nThe script uses Scapy to generate and send a DNS query to specific server.\nThe qname field of the DNS query is filled with a string of 300 repeated “A” characters, creating a malformed request.\nWhile this PoC does not directly exploit Nginx, it demonstrates how malformed or unexpected input can be used in a network interaction, potentially leading to misconfigurations being revealed.\n\nCVE-2021-23017: Una vulnerabilidad en el resolvedor DNS de NGINX que podría permitir a un atacante remoto provocar una denegación de servicio o ejecutar código arbitrario mediante respuestas DNS especialmente diseñadas. \n# Uso\n\npip install scapy\n\npython3 dns_test.py\n\n\n# Uso y advertencias\n¿Qué hace este script?\nEnvía una consulta DNS con un nombre de dominio de 300 caracteres.\nPuede utilizarse para probar la resistencia de servidores DNS o aplicaciones que dependen de estos, como NGINX.\n\n# Advertencia\n⚠ Este script debe ejecutarse solo en entornos de prueba.\n⚠ No lo uses en servidores públicos sin autorización, ya que podría interpretarse como una actividad maliciosa.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmoften%2Fmalformeddnsquerynginx","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmoften%2Fmalformeddnsquerynginx","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmoften%2Fmalformeddnsquerynginx/lists"}