{"id":"ALSA-2023:5989","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":"2026-01-30T02:35:32.604276Z","published":"2023-10-23T00:00:00Z","related":["CVE-2023-44487"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2023:5989"},{"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/8/ALSA-2023-5989.html"}],"affected":[{"package":{"name":"varnish","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/varnish"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.8-3.module_el8.8.0+3665+0b8dabc5.1.alma.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2023:5989.json"}},{"package":{"name":"varnish-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/varnish-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.8-3.module_el8.8.0+3665+0b8dabc5.1.alma.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2023:5989.json"}},{"package":{"name":"varnish-docs","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/varnish-docs"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.8-3.module_el8.8.0+3665+0b8dabc5.1.alma.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2023:5989.json"}},{"package":{"name":"varnish-modules","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/varnish-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.15.0-6.module_el8.5.0+2620+03a0c2cc"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2023:5989.json"}},{"package":{"name":"varnish-modules","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/varnish-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.15.0-6.module_el8.5.0+76+a10ffa55"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2023:5989.json"}},{"package":{"name":"varnish-modules","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/varnish-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.15.0-6.module_el8.6.0+3089+dac88e97"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2023:5989.json"}}],"schema_version":"1.7.3"}