{"id":"CVE-2019-18409","aliases":["EUVD-2019-0704","GHSA-hhwc-8g49-j8jx"],"status":"published","title":"Ruby_parser-legacy Incorrect Permission Assignment for Critical Resource","description":"The ruby_parser-legacy (aka legacy) gem 1.0.0 for Ruby allows local privilege escalation because of world-writable files. For example, if the brakeman gem (which has a legacy dependency) 4.5.0 through 4.7.0 is used, a local user can insert malicious code into the ruby_parser-legacy-1.0.0/lib/ruby_parser/legacy/ruby_parser.rb file.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00332,"percentile":0.26568,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-732"],"published":"2019-10-24T13:59:19Z","modified":"2026-10-20T10:50:50Z","affected":[{"source":"ghsa","ecosystem":"RubyGems","package":"ruby_parser-legacy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.0.0"}]}]},{"source":"osv","ecosystem":"RubyGems","package":"ruby_parser-legacy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.0.0"}]}],"versions":["1.0.0"]}],"products":[{"vendor":"zenspider","product":"ruby_parser-legacy"}],"references":[{"url":"https://github.com/zenspider/ruby_parser-legacy/issues/1","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-18409","tags":["advisory"]},{"url":"https://brakemanscanner.org/blog/2019/10/14/brakeman-4-dot-7-dot-1-released","tags":["web"]},{"url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/brakeman/CVE-2019-18409.yml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-hhwc-8g49-j8jx"},{"url":"https://github.com/zenspider/ruby_parser-legacy","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2019-18409","description":"The ruby_parser-legacy (aka legacy) gem 1.0.0 for Ruby allows local privilege escalation because of world-writable files. For example, if the brakeman gem (which has a legacy dependency) 4.5.0 through 4.7.0 is used, a local user can insert malicious code into the ruby_parser-legacy-1.0.0/lib/ruby_parser/legacy/ruby_parser.rb file.","status":"published","published":"2019-10-24T13:59:19Z","modified":"2024-08-05T01:54:14.406Z","updated_at":"2026-11-02T14:32:23.803059Z"}],"euvd":[{"id":"EUVD-2019-0704","description":"The ruby_parser-legacy (aka legacy) gem 1.0.0 for Ruby allows local privilege escalation because of world-writable files. For example, if the brakeman gem (which has a legacy dependency) 4.5.0 through 4.7.0 is used, a local user can insert malicious code into the ruby_parser-legacy-1.0.0/lib/ruby_parser/legacy/ruby_parser.rb file.","status":"published","published":"2019-10-24T13:59:19Z","modified":"2024-08-05T01:54:14Z","updated_at":"2026-11-03T02:40:28.293703Z"}],"ghsa":[{"id":"GHSA-hhwc-8g49-j8jx","title":"Ruby_parser-legacy Incorrect Permission Assignment for Critical Resource","description":"The ruby_parser-legacy (aka legacy) gem 1.0.0 for Ruby allows local privilege escalation because of world-writable files. For example, if the brakeman gem (which has a legacy dependency) 4.5.0 through 4.7.0 is used, a local user can insert malicious code into the `ruby_parser-legacy-1.0.0/lib/ruby_parser/legacy/ruby_parser.rb` file.","status":"published","published":"2019-10-25T19:41:34Z","modified":"2023-08-25T23:43:44Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-732"],"updated_at":"2026-11-02T14:37:00.680009Z"}],"nvd":[{"id":"CVE-2019-18409","description":"The ruby_parser-legacy (aka legacy) gem 1.0.0 for Ruby allows local privilege escalation because of world-writable files. For example, if the brakeman gem (which has a legacy dependency) 4.5.0 through 4.7.0 is used, a local user can insert malicious code into the ruby_parser-legacy-1.0.0/lib/ruby_parser/legacy/ruby_parser.rb file.","status":"published","published":"2019-10-24T14:15:11.583Z","modified":"2026-06-17T02:24:58.91Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-732"],"updated_at":"2026-11-02T14:05:32.982925Z"}],"osv":[{"id":"CVE-2019-18409","description":"The ruby_parser-legacy (aka legacy) gem 1.0.0 for Ruby allows local privilege escalation because of world-writable files. For example, if the brakeman gem (which has a legacy dependency) 4.5.0 through 4.7.0 is used, a local user can insert malicious code into the ruby_parser-legacy-1.0.0/lib/ruby_parser/legacy/ruby_parser.rb file.","status":"published","published":"2019-10-24T14:15:11.583Z","modified":"2026-10-20T10:50:50.777032281Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:11.673963Z"},{"id":"GHSA-hhwc-8g49-j8jx","title":"Ruby_parser-legacy Incorrect Permission Assignment for Critical Resource","description":"The ruby_parser-legacy (aka legacy) gem 1.0.0 for Ruby allows local privilege escalation because of world-writable files. For example, if the brakeman gem (which has a legacy dependency) 4.5.0 through 4.7.0 is used, a local user can insert malicious code into the `ruby_parser-legacy-1.0.0/lib/ruby_parser/legacy/ruby_parser.rb` file.","status":"published","published":"2019-10-25T19:41:34Z","modified":"2024-02-16T08:19:58.081155Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-732"],"updated_at":"2026-11-02T15:46:49.28217Z"}]}}