{"id":"RLSA-2021:2259","summary":"Important: nginx:1.18 security update","details":"nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. \n\nSecurity Fix(es):\n\n* nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name (CVE-2021-23017)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-02-04T21:15:07.204472Z","published":"2021-06-07T10:02:53Z","upstream":["CVE-2021-23017"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:2259"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1963121"}],"affected":[{"package":{"name":"nginx","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/nginx?distro=rocky-linux-8&epoch=1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.18.0-3.module+el8.4.0+544+e40554cf.1"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:2259.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}