Safety vulnerability ID: 40438
The information on this page was manually curated by our Cybersecurity Intelligence Team.
Matrix-synapse 1.33.2 includes a fix for CVE-2021-29471: 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 1.33.2 "Push rules" can specify conditions under which they will match, including `event_match`, which matches event content against a pattern including wildcards. Certain patterns can cause very poor performance in the matching engine, leading to a denial-of-service when processing moderate length events. The issue was patched in version 1.33.2. A potential workaround might be to prevent users from making custom push rules, by blocking such requests at a reverse-proxy.
https://github.com/matrix-org/synapse/security/advisories/GHSA-x345-32rc-8h85
Latest version: 1.121.1
Homeserver for the Matrix decentralised comms protocol
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 1.33.2 "Push rules" can specify conditions under which they will match, including `event_match`, which matches event content against a pattern including wildcards. Certain patterns can cause very poor performance in the matching engine, leading to a denial-of-service when processing moderate length events. The issue is patched in version 1.33.2. A potential workaround might be to prevent users from making custom push rules, by blocking such requests at a reverse-proxy. See CVE-2021-29471.
CONFIRM:https://github.com/matrix-org/synapse/security/advisories/GHSA-x345-32rc-8h85: https://github.com/matrix-org/synapse/security/advisories/GHSA-x345-32rc-8h85
MISC:https://github.com/matrix-org/synapse/commit/03318a766cac9f8b053db2214d9c332a977d226c: https://github.com/matrix-org/synapse/commit/03318a766cac9f8b053db2214d9c332a977d226c
MISC:https://github.com/matrix-org/synapse/releases/tag/v1.33.2: https://github.com/matrix-org/synapse/releases/tag/v1.33.2
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