{"id":21135290,"url":"https://github.com/cloneofsimo/zap","last_synced_at":"2025-08-11T04:07:26.884Z","repository":{"id":98904569,"uuid":"364578603","full_name":"cloneofsimo/zap","owner":"cloneofsimo","description":null,"archived":false,"fork":false,"pushed_at":"2021-05-05T13:21:14.000Z","size":410,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":2,"default_branch":"master","last_synced_at":"2025-05-30T09:58:24.628Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"C","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/cloneofsimo.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}},"created_at":"2021-05-05T13:03:42.000Z","updated_at":"2021-05-05T13:21:17.000Z","dependencies_parsed_at":null,"dependency_job_id":"a24314b6-e5cf-47ca-b276-68bbad0cbce6","html_url":"https://github.com/cloneofsimo/zap","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/cloneofsimo/zap","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/cloneofsimo%2Fzap","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/cloneofsimo%2Fzap/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/cloneofsimo%2Fzap/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/cloneofsimo%2Fzap/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/cloneofsimo","download_url":"https://codeload.github.com/cloneofsimo/zap/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/cloneofsimo%2Fzap/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":269827569,"owners_count":24481541,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-08-11T02:00:10.019Z","response_time":75,"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":"2024-11-20T06:48:21.471Z","updated_at":"2025-08-11T04:07:26.862Z","avatar_url":"https://github.com/cloneofsimo.png","language":"C","funding_links":[],"categories":[],"sub_categories":[],"readme":"# What is this?\n\n해당 과제는 과목37의 중간고사 대체과제로서, zap (http://cd.textfiles.com/hackersencyc/HACKING/UNIX/ZAP.C) 이 가지고 있는 문제점을 해결하는 과제이다. 구체적으로, zap은 wtmp, utmp 파일 내부에 EOF 가 아닌 nullbyte가 발생하도록 하고, 이는 궁극적으로 rootkit detector인 ckhwtmp로부터 들키게 된다.\n나아가 lastlog는 모두 제거(nullbyte 로 채움)해버리는데, 이 또한 rootkit detector 인 chklastlog로부터 들키게 된다. 이 보고서에서는 이를 해결하기 위해 어떤 방법을 택했는지, 또 실제로 적용해 봄으로서 그 방법의 타당성 또한 증명할 것이다.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcloneofsimo%2Fzap","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fcloneofsimo%2Fzap","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcloneofsimo%2Fzap/lists"}