{"id":"MGASA-2020-0421","summary":"Updated firefox and thunderbird packages fix a security vulnerability","details":"Write side effects in MCallGetProperty opcode not accounted for.\nIn certain circumstances, the MCallGetProperty opcode can be emitted with\nunmet assumptions resulting in an exploitable use-after-free condition.\n(CVE-2020-26950)\n\nAlso some bugfix for Thunderbird have been added. See upstream release notes.\n","modified":"2026-01-30T07:32:41.414618Z","published":"2020-11-13T21:20:36Z","related":["CVE-2020-26950"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2020-0421.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=27589"},{"type":"REPORT","url":"https://www.mozilla.org/en-US/security/advisories/mfsa2020-49/"},{"type":"REPORT","url":"https://www.mozilla.org/en-US/firefox/78.4.1/releasenotes/"},{"type":"REPORT","url":"https://www.thunderbird.net/en-US/thunderbird/78.4.1/releasenotes/"},{"type":"REPORT","url":"https://www.thunderbird.net/en-US/thunderbird/78.4.2/releasenotes/"},{"type":"REPORT","url":"https://access.redhat.com/errata/RHSA-2020:5100"}],"affected":[{"package":{"name":"firefox","ecosystem":"Mageia:7","purl":"pkg:rpm/mageia/firefox?arch=source&distro=mageia-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"78.4.1-1.mga7"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2020-0421.json"}},{"package":{"name":"firefox-l10n","ecosystem":"Mageia:7","purl":"pkg:rpm/mageia/firefox-l10n?arch=source&distro=mageia-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"78.4.1-1.mga7"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2020-0421.json"}},{"package":{"name":"thunderbird","ecosystem":"Mageia:7","purl":"pkg:rpm/mageia/thunderbird?arch=source&distro=mageia-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"78.4.2-1.mga7"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2020-0421.json"}},{"package":{"name":"thunderbird-l10n","ecosystem":"Mageia:7","purl":"pkg:rpm/mageia/thunderbird-l10n?arch=source&distro=mageia-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"78.4.2-1.mga7"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2020-0421.json"}}],"schema_version":"1.7.3","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}