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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities
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CVE-2022-41952 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/matrix-org/synapse/pull/11784 Patch  Third Party Advisory 
https://github.com/matrix-org/synapse/pull/11936 Patch  Third Party Advisory 
https://github.com/matrix-org/synapse/releases/tag/v1.52.0 Release Notes  Third Party Advisory 
https://github.com/matrix-org/synapse/releases/tag/v1.53.0 Release Notes  Third Party Advisory 
https://github.com/matrix-org/synapse/security/advisories/GHSA-4822-jvwx-w47h Mitigation  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-772 Missing Release of Resource after Effective Lifetime cwe source acceptance level NIST  
CWE-400 Uncontrolled Resource Consumption GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-41952
NVD Published Date:
11/22/2022
NVD Last Modified:
07/06/2023
Source:
GitHub, Inc.