{"id":"UBUNTU-CVE-2018-12247","details":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class, related to certain .clone usage, because mrb_obj_clone in kernel.c copies flags other than the MRB_FLAG_IS_FROZEN flag (e.g., the embedded flag).","modified":"2026-01-20T16:43:35.303668Z","published":"2018-06-12T14:29:00Z","upstream":["CVE-2018-12247"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-12247"},{"type":"REPORT","url":"https://github.com/mruby/mruby/commit/55edae0226409de25e59922807cb09acb45731a2"},{"type":"REPORT","url":"https://github.com/mruby/mruby/issues/4036"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-12247"}],"affected":[{"package":{"name":"mruby","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mruby@1.2.0+20160315+git4f20d58a-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0+20150817+gita1731254-1","1.1.0+20150906+git1cbbb7e1-1","1.2.0+20160315+git4f20d58a-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.2.0+20160315+git4f20d58a-1","binary_name":"libmruby-dev"},{"binary_version":"1.2.0+20160315+git4f20d58a-1","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12247.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mruby@1.4.0-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.0-1","1.3.0+20170925+git38185028-1","1.3.0+20171029+git77edafb0-1","1.4.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.0-1","binary_name":"libmruby-dev"},{"binary_version":"1.4.0-1","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12247.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mruby@2.0.0-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.0-1","binary_name":"libmruby-dev"},{"binary_version":"2.0.0-1","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12247.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mruby@3.0.0-3?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-3","3.0.0-1","3.0.0-3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.0.0-3","binary_name":"libmruby-dev"},{"binary_version":"3.0.0-3","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12247.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/mruby@3.2.0-2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.0-1","3.2.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.2.0-2","binary_name":"libmruby-dev"},{"binary_version":"3.2.0-2","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12247.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/mruby@3.3.0-1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.3.0-1","binary_name":"libmruby-dev"},{"binary_version":"3.3.0-1","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12247.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}