{"id":"CVE-2018-8778","details":"In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker controlling the unpacking format (similar to format string vulnerabilities) can trigger a buffer under-read in the String#unpack method, resulting in a massive and controlled information disclosure.","modified":"2026-07-08T05:54:39.383537901Z","published":"2018-04-03T22:29:00.773Z","related":["SUSE-SU-2019:1804-1","SUSE-SU-2020:1570-1","openSUSE-SU-2019:1771-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"14.04"},{"last_affected":"14.04"},{"introduced":"16.04"},{"last_affected":"16.04"},{"introduced":"17.10"},{"last_affected":"17.10"}],"source":"CPE_STRING","vendor_product":"canonical:ubuntu_linux","cpes":["cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*"]},{"extracted_events":[{"introduced":"7.0"},{"last_affected":"7.0"},{"introduced":"8.0"},{"last_affected":"8.0"},{"introduced":"9.0"},{"last_affected":"9.0"}],"source":"CPE_STRING","vendor_product":"debian:debian_linux","cpes":["cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"]},{"extracted_events":[{"introduced":"6.0"},{"last_affected":"6.0"},{"introduced":"7.0"},{"last_affected":"7.0"},{"introduced":"7.4"},{"last_affected":"7.4"},{"introduced":"7.5"},{"last_affected":"7.5"},{"introduced":"7.6"},{"last_affected":"7.6"}],"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux","cpes":["cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:*"]}]},"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/103693"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1042004"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3729"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3730"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3731"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2028"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3626-1/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4259"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/"},{"type":"FIX","url":"https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/"},{"type":"FIX","url":"https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/"},{"type":"FIX","url":"https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/"},{"type":"FIX","url":"https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ruby/ruby","events":[{"introduced":"7393bf6a5cfff63683f36535e293caaa0d4c5be0"},{"fixed":"933bb2b8b57c48dc664fce6d752670e6521a4141"},{"introduced":"d40ea2afa6ff5a6e5befcf342fb7b6dc58796b20"},{"fixed":"9bfe7fc5cb457c7bc8df96115ee70b9035f5d885"},{"introduced":"d4bb726b713658f56e630b6cf817a0155b6f390e"},{"fixed":"a8197e08f58c5f2e6d32a774866e0e0d58749911"},{"introduced":"4e0a512972cdcbfcd5279f1a2a81ba342ed75b6e"},{"fixed":"85883dc393f60adc3043d28899eff3f1ce53b4a5"},{"introduced":"ce0e3fc1b10d1f5c5ad6bc31ba344904345468a2"},{"last_affected":"ce0e3fc1b10d1f5c5ad6bc31ba344904345468a2"}],"database_specific":{"cpe":["cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*","cpe:2.3:a:ruby-lang:ruby:2.6.0:preview1:*:*:*:*:*:*"],"extracted_events":[{"introduced":"2.2.0"},{"fixed":"2.2.10"},{"introduced":"2.3.0"},{"fixed":"2.3.7"},{"introduced":"2.4.0"},{"fixed":"2.4.4"},{"introduced":"2.5.0"},{"fixed":"2.5.1"},{"introduced":"2.6.0-preview1"},{"last_affected":"2.6.0-preview1"}],"source":["CPE_RANGE","CPE_STRING"]}}],"versions":["2.6.0-preview1","v2_6_0_preview1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-8778.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}