{"id":"ALSA-2023:5924","summary":"Important: varnish security 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\nSecurity Fix(es):\n\n* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)\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":"2026-02-04T04:03:45.324733Z","published":"2023-10-19T00:00:00Z","related":["CVE-2023-44487"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2023:5924"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2023-44487"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2242803"},{"type":"ADVISORY","url":"https://errata.almalinux.org/9/ALSA-2023-5924.html"}],"affected":[{"package":{"name":"varnish","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/varnish"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.2-3.el9_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2023:5924.json"}},{"package":{"name":"varnish-devel","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/varnish-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.2-3.el9_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2023:5924.json"}},{"package":{"name":"varnish-docs","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/varnish-docs"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.2-3.el9_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2023:5924.json"}}],"schema_version":"1.7.3"}