{"id":"MGASA-2022-0436","summary":"Updated dropbear packages fix security vulnerability","details":"Updated dropbear package fixes a security vulnerability in dbclient:.\nDue to a non-RFC-compliant check of the available authentication methods\nin the client-side SSH code, it is possible for an SSH server to change\nthe login process in its favor. This attack can bypass additional security\nmeasures such as FIDO2 tokens or SSH-Askpass. Thus, it allows an attacker\nto abuse a forwarded agent for logging on to another server unnoticed.\n\nThe fix adds a new option, DisableTrivialAuth, to dbclient to disable this\nattack vector. Invoke dbclient as\n\"dbclient -o DisableTrivialAuth=yes localhost …\" to enable this mitigation\non each dbclient invocation.\n","modified":"2026-04-16T00:12:44.570109282Z","published":"2022-11-24T22:21:24Z","upstream":["CVE-2021-36369"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2022-0436.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=31119"},{"type":"WEB","url":"https://github.com/mkj/dropbear/pull/128"}],"affected":[{"package":{"name":"dropbear","ecosystem":"Mageia:8","purl":"pkg:rpm/mageia/dropbear?arch=source&distro=mageia-8"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.81-1.1.mga8"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2022-0436.json"}}],"schema_version":"1.7.5","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}