{"id":"RLSA-2020:4756","summary":"Moderate: varnish:6 security, bug fix, and enhancement update","details":"Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up.\n\nThe following packages have been upgraded to a later upstream version: varnish (6.0.6). (BZ#1795673)\n\nSecurity Fix(es):\n\n* varnish: denial of service handling certain crafted HTTP/1 requests (CVE-2019-15892)\n\n* varnish: remote clients may cause Varnish to assert and restart which could result in DoS (CVE-2020-11653)\n\n* varnish: not clearing pointer between two client requests leads to information disclosure (CVE-2019-20637)\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.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 8.3 Release Notes linked from the References section.","modified":"2026-02-05T05:00:13.787089Z","published":"2020-11-03T12:33:31Z","upstream":["CVE-2019-15892","CVE-2019-20637","CVE-2020-11653"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2020:4756"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1756079"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1772362"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1813867"}],"affected":[{"package":{"name":"varnish","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/varnish?distro=rocky-linux-8-4-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:6.0.6-2.module+el8.3.0+179+20b582cc"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2020:4756.json"}},{"package":{"name":"varnish-modules","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/varnish-modules?distro=rocky-linux-8-4-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.15.0-5.module+el8.3.0+179+20b582cc"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2020:4756.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"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}