CVE-2024-52815

Synapse allows a a malformed invite to break the invitee's `/sync`

State: Published
Severity: 8.7 High
Published: Dec 3, 2024
Updated: Dec 3, 2024
Reserved: Nov 15, 2024

Description

Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Synapse 1.120.1 rejects such invalid invites received over federation and restores the ability to sync for affected users.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
synapseelement-hq	< 1.120.1Affected

References

https://github.com/element-hq/synapse/security/advisories/GHSA-f3r3-h2mq-hx2h

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