{"id":"USN-6087-1","summary":"ruby2.3, ruby2.5, ruby2.7 vulnerabilities","details":"It was discovered that Ruby incorrectly handled certain regular expressions.\nAn attacker could possibly use this issue to cause a denial of service.\n(CVE-2023-28755)\n\nIt was discovered that Ruby incorrectly handled certain regular expressions.\nAn attacker could possily use this issue to cause a denial of service.\nThis issue only affected Ubuntu 16.04 ESM. (CVE-2023-28756)\n","modified":"2026-02-10T04:43:08Z","published":"2023-05-18T09:35:29Z","related":["UBUNTU-CVE-2023-28755","UBUNTU-CVE-2023-28756"],"upstream":["CVE-2023-28755","CVE-2023-28756","UBUNTU-CVE-2023-28755","UBUNTU-CVE-2023-28756"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6087-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-28755"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-28756"}],"affected":[{"package":{"name":"ruby2.3","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ruby2.3@2.3.1-2~ubuntu16.04.16+esm7?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.1-2~ubuntu16.04.16+esm7"}]}],"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","2.3.1-2~ubuntu16.04.16+esm2","2.3.1-2~ubuntu16.04.16+esm3","2.3.1-2~ubuntu16.04.16+esm4","2.3.1-2~ubuntu16.04.16+esm5","2.3.1-2~ubuntu16.04.16+esm6"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.1-2~ubuntu16.04.16+esm7","binary_name":"libruby2.3"},{"binary_version":"2.3.1-2~ubuntu16.04.16+esm7","binary_name":"ruby2.3"},{"binary_version":"2.3.1-2~ubuntu16.04.16+esm7","binary_name":"ruby2.3-dev"},{"binary_version":"2.3.1-2~ubuntu16.04.16+esm7","binary_name":"ruby2.3-tcltk"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6087-1.json","cves_map":{"cves":[{"id":"CVE-2023-28755","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-28756","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"}}},{"package":{"name":"ruby2.5","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ruby2.5@2.5.1-1ubuntu1.16?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.1-1ubuntu1.16"}]}],"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","2.5.1-1ubuntu1.11","2.5.1-1ubuntu1.12","2.5.1-1ubuntu1.13","2.5.1-1ubuntu1.14","2.5.1-1ubuntu1.15"],"ecosystem_specific":{"binaries":[{"binary_version":"2.5.1-1ubuntu1.16","binary_name":"libruby2.5"},{"binary_version":"2.5.1-1ubuntu1.16","binary_name":"ruby2.5"},{"binary_version":"2.5.1-1ubuntu1.16","binary_name":"ruby2.5-dev"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6087-1.json","cves_map":{"cves":[{"id":"CVE-2023-28755","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-28756","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:18.04:LTS"}}},{"package":{"name":"ruby2.7","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ruby2.7@2.7.0-5ubuntu1.11?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.0-5ubuntu1.11"}]}],"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","2.7.0-5ubuntu1.6","2.7.0-5ubuntu1.7","2.7.0-5ubuntu1.8","2.7.0-5ubuntu1.9","2.7.0-5ubuntu1.10"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.0-5ubuntu1.11","binary_name":"libruby2.7"},{"binary_version":"2.7.0-5ubuntu1.11","binary_name":"ruby2.7"},{"binary_version":"2.7.0-5ubuntu1.11","binary_name":"ruby2.7-dev"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6087-1.json","cves_map":{"cves":[{"id":"CVE-2023-28755","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-28756","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:20.04:LTS"}}}],"schema_version":"1.7.3"}