http://bugzilla.opensuse.org/show_bug.cgi?id=1203105 Bug ID: 1203105 Summary: VUL-0: CVE-2022-31152: matrix-synapse: denial of service due to incorrect application of event authorization rules Classification: openSUSE Product: openSUSE Distribution Version: Leap 15.4 Hardware: Other URL: https://smash.suse.de/issue/341463/ OS: Other Status: NEW Severity: Minor Priority: P5 - None Component: Security Assignee: asarai@suse.com Reporter: thomas.leroy@suse.com QA Contact: security-team@suse.de Found By: Security Response Team Blocker: --- rh#2124168 Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_docum...) to an empty list (`[]`) as a workaround. References: https://bugzilla.redhat.com/show_bug.cgi?id=2124168 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-31152 https://github.com/matrix-org/synapse/pull/13087 https://github.com/matrix-org/synapse/releases/tag/v1.62.0 https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-476... https://github.com/matrix-org/synapse/pull/13088 https://www.cve.org/CVERecord?id=CVE-2022-31152 -- You are receiving this mail because: You are on the CC list for the bug.