CVE - CVE-2022-41952

CVE-ID
CVE-2022-41952	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
Synapse before 1.52.0 with URL preview functionality enabled will attempt to generate URL previews for media stream URLs without properly limiting connection time. Connections will only be terminated after `max_spider_size` (default: 10M) bytes have been downloaded, which can in some cases lead to long-lived connections towards the streaming media server (for instance, Icecast). This can cause excessive traffic and connections toward such servers if their stream URL is, for example, posted to a large room with many Synapse instances with URL preview enabled. Version 1.52.0 implements a timeout mechanism which will terminate URL preview connections after 30 seconds. Since generating URL previews for media streams is not supported and always fails, 1.53.0 additionally implements an allow list for content types for which Synapse will even attempt to generate a URL preview. Upgrade to 1.53.0 to fully resolve the issue. As a workaround, turn off URL preview functionality by setting `url_preview_enabled: false` in the Synapse configuration file.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/matrix-org/synapse/security/advisories/GHSA-4822-jvwx-w47h URL:https://github.com/matrix-org/synapse/security/advisories/GHSA-4822-jvwx-w47h MISC:https://github.com/matrix-org/synapse/pull/11784 URL:https://github.com/matrix-org/synapse/pull/11784 MISC:https://github.com/matrix-org/synapse/pull/11936 URL:https://github.com/matrix-org/synapse/pull/11936 MISC:https://github.com/matrix-org/synapse/releases/tag/v1.52.0 URL:https://github.com/matrix-org/synapse/releases/tag/v1.52.0 MISC:https://github.com/matrix-org/synapse/releases/tag/v1.53.0 URL:https://github.com/matrix-org/synapse/releases/tag/v1.53.0
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20220930	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20220930)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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