{"id":"USN-5235-1","summary":"ruby2.3, ruby2.5, ruby2.7 vulnerabilities","details":"It was discovered that Ruby incorrectly handled certain HTML files.\nAn attacker could possibly use this issue to cause a crash. This\nissue only affected Ubuntu 20.04 LTS, Ubuntu 21.04, and Ubuntu 21.10.\n(CVE-2021-41816)\n\nIt was discovered that Ruby incorrectly handled certain regular expressions.\nAn attacker could possibly use this issue to cause a regular expression\ndenial of service. (CVE-2021-41817)\n\nIt was discovered that Ruby incorrectly handled certain cookie names.\nAn attacker could possibly use this issue to access or expose\nsensitive information. (CVE-2021-41819)\n","modified":"2026-06-25T13:30:54.026619924Z","published":"2022-01-18T17:13:18Z","related":["UBUNTU-CVE-2021-41816","UBUNTU-CVE-2021-41817","UBUNTU-CVE-2021-41819"],"upstream":["CVE-2021-41816","CVE-2021-41817","CVE-2021-41819","UBUNTU-CVE-2021-41816","UBUNTU-CVE-2021-41817","UBUNTU-CVE-2021-41819"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5235-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-41816"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-41817"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-41819"}],"affected":[{"package":{"name":"ruby2.3","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ruby2.3?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.1-2~ubuntu16.04.16+esm2"}]}],"versions":["2.3.0-1","2.3.0-2","2.3.0-4ubuntu2","2.3.0-4ubuntu3","2.3.0-5ubuntu1","2.3.1-2~16.04","2.3.1-2~16.04.2","2.3.1-2~16.04.4","2.3.1-2~16.04.5","2.3.1-2~16.04.6","2.3.1-2~16.04.7","2.3.1-2~16.04.9","2.3.1-2~16.04.10","2.3.1-2~16.04.11","2.3.1-2~16.04.12","2.3.1-2~ubuntu16.04.13","2.3.1-2~ubuntu16.04.14","2.3.1-2~ubuntu16.04.15","2.3.1-2~ubuntu16.04.16","2.3.1-2~ubuntu16.04.16+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.1-2~ubuntu16.04.16+esm2","binary_name":"libruby2.3"},{"binary_name":"ruby2.3","binary_version":"2.3.1-2~ubuntu16.04.16+esm2"},{"binary_name":"ruby2.3-tcltk","binary_version":"2.3.1-2~ubuntu16.04.16+esm2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2021-41817","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-41819"}],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5235-1.json"}},{"package":{"name":"ruby2.5","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ruby2.5?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.1-1ubuntu1.11"}]}],"versions":["2.5.0~preview1-1ubuntu2","2.5.0-4ubuntu1","2.5.0-4ubuntu4","2.5.0-5ubuntu1","2.5.0-6ubuntu1","2.5.1-1ubuntu1","2.5.1-1ubuntu1.1","2.5.1-1ubuntu1.2","2.5.1-1ubuntu1.4","2.5.1-1ubuntu1.5","2.5.1-1ubuntu1.6","2.5.1-1ubuntu1.7","2.5.1-1ubuntu1.8","2.5.1-1ubuntu1.9","2.5.1-1ubuntu1.10"],"ecosystem_specific":{"binaries":[{"binary_version":"2.5.1-1ubuntu1.11","binary_name":"libruby2.5"},{"binary_version":"2.5.1-1ubuntu1.11","binary_name":"ruby2.5"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"id":"CVE-2021-41817","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2021-41819","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5235-1.json"}},{"package":{"name":"ruby2.7","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ruby2.7?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.0-5ubuntu1.6"}]}],"versions":["2.7.0-1","2.7.0-2","2.7.0-3","2.7.0-4","2.7.0-4ubuntu1","2.7.0-5ubuntu1","2.7.0-5ubuntu1.1","2.7.0-5ubuntu1.2","2.7.0-5ubuntu1.3","2.7.0-5ubuntu1.4","2.7.0-5ubuntu1.5"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.0-5ubuntu1.6","binary_name":"libruby2.7"},{"binary_name":"ruby2.7","binary_version":"2.7.0-5ubuntu1.6"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-41816"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-41817"},{"id":"CVE-2021-41819","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5235-1.json"}}],"schema_version":"1.7.5"}