{"id":"RLSA-2021:4130","summary":"Important: thunderbird security update","details":"Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nThis update upgrades Thunderbird to version 91.3.0.\n\nSecurity Fix(es):\n\n* Mozilla: Use-after-free in HTTP2 Session object\n\n* Mozilla: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3\n\n* Mozilla: iframe sandbox rules did not apply to XSLT stylesheets (CVE-2021-38503)\n\n* Mozilla: Use-after-free in file picker dialog (CVE-2021-38504)\n\n* Mozilla: Firefox could be coaxed into going into fullscreen mode without notification or warning (CVE-2021-38506)\n\n* Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports (CVE-2021-38507)\n\n* Mozilla: Permission Prompt could be overlaid, resulting in user confusion and potential spoofing (CVE-2021-38508)\n\n* Mozilla: Javascript alert box could have been spoofed onto an arbitrary domain (CVE-2021-38509)\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":"2026-03-11T06:00:03.299773Z","published":"2021-11-04T16:03:41Z","upstream":["CVE-2021-38503","CVE-2021-38504","CVE-2021-38506","CVE-2021-38507","CVE-2021-38508","CVE-2021-38509","CVE-2021-43529","CVE-2021-43534","CVE-2021-43535"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:4130"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2019621"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2019622"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2019624"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2019625"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2019626"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2019627"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2019628"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2019630"}],"affected":[{"package":{"name":"thunderbird","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/thunderbird?distro=rocky-linux-8-4-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:91.3.0-2.el8_4"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4130.json"}},{"package":{"name":"thunderbird","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/thunderbird?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:91.3.0-2.el8"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4130.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}