{"id":"GHSA-c7hh-3v6c-fj4q","summary":"matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms","details":"### Impact\n\nIt was possible to craft an event such that it would leak part of a targeted message event from another bridged room. This required knowing an event ID to target.\n\n### Patches\n\nPlease upgrade to 1.0.1.\n\n### Workarounds\n\nYou can set the `matrixHandler.eventCacheSize` config value to `0` to workaround this bug. However, this may impact performance.\n\n### Credits\n\nDiscovered and reported by [Val Lorentz](https://valentin-lorentz.fr/).\n\n### For more information\n\nIf you have any questions or comments about this advisory email us at [security@matrix.org](mailto:security@matrix.org).","aliases":["CVE-2023-38700"],"modified":"2023-11-08T04:13:09.727778Z","published":"2023-08-04T17:26:07Z","database_specific":{"nvd_published_at":"2023-08-04T19:15:09Z","cwe_ids":["CWE-200"],"severity":"LOW","github_reviewed":true,"github_reviewed_at":"2023-08-04T17:26:07Z"},"references":[{"type":"WEB","url":"https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-c7hh-3v6c-fj4q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38700"},{"type":"WEB","url":"https://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75"},{"type":"PACKAGE","url":"https://github.com/matrix-org/matrix-appservice-irc"},{"type":"WEB","url":"https://github.com/matrix-org/matrix-appservice-irc/releases/tag/1.0.1"}],"affected":[{"package":{"name":"matrix-appservice-irc","ecosystem":"npm","purl":"pkg:npm/matrix-appservice-irc"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.0.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/08/GHSA-c7hh-3v6c-fj4q/GHSA-c7hh-3v6c-fj4q.json","last_known_affected_version_range":"\u003c= 1.0.0"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N"}]}