{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"moderate"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"SUSE CVE-2021-21394","title":"Title"},{"category":"description","text":"Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. Note that the groups feature is not part of the Matrix specification and the chosen maximum lengths are arbitrary. Not all clients might abide by them. Refer to referenced GitHub security advisory for additional details including workarounds.","title":"Description of the CVE"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"CVE-2021-21394","url":"https://www.suse.com/security/cve/CVE-2021-21394"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1184747 for CVE-2021-21394","url":"https://bugzilla.suse.com/1184747"}],"title":"SUSE CVE CVE-2021-21394","tracking":{"current_release_date":"2025-02-17T05:46:23Z","generator":{"date":"2023-02-15T03:46:15Z","engine":{"name":"cve-database.git:bin/generate-csaf-vex.pl","version":"1"}},"id":"CVE-2021-21394","initial_release_date":"2023-02-15T03:46:15Z","revision_history":[{"date":"2023-02-15T03:46:15Z","number":"2","summary":"Current version"},{"date":"2025-01-01T04:45:53Z","number":"3","summary":"Current version"},{"date":"2025-02-15T05:20:19Z","number":"4","summary":"Current version"},{"date":"2025-02-17T05:46:23Z","number":"5","summary":"Current version"}],"status":"interim","version":"5"}}}