CVE-2022-31052
published 2022-06-28CVE-2022-31052: Synapse is an open source home server implementation for the Matrix chat network. In versions prior to 1.61.1 URL previews of some web pages can exhaust the…
PriorityP338medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
1.58%
72.6th percentile
Synapse is an open source home server implementation for the Matrix chat network. In versions prior to 1.61.1 URL previews of some web pages can exhaust the available stack space for the Synapse process due to unbounded recursion. This is sometimes recoverable and leads to an error for the request causing the problem, but in other cases the Synapse process may crash altogether. It is possible to exploit this maliciously, either by malicious users on the homeserver, or by remote users sending URLs that a local user's client may automatically request a URL preview for. Remote users are not able to exploit this directly, because the URL preview endpoint is authenticated. Deployments with `url_preview_enabled: false` set in configuration are not affected. Deployments with `url_preview_enabled: true` set in configuration **are** affected. Deployments with no configuration value set for `url_preview_enabled` are not affected, because the default is `false`. Administrators of homeservers with URL previews enabled are advised to upgrade to v1.61.1 or higher. Users unable to upgrade should set `url_preview_enabled` to false.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | matrix-synapse | < matrix-synapse 1.61.1-1 (forky) | matrix-synapse 1.61.1-1 (forky) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| matrix-org | synapse | < 1.61.1 | 1.61.1 |
| matrix | synapse | < 1.61.1 | 1.61.1 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv2.03.5LOWAV:N/AC:M/Au:S/C:N/I:N/A:P
osv6.5MEDIUM
vendor_debian6.5MEDIUM
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OSV
URL previews of unusual or maliciously-crafted pages can crash Synapse media repositories or Synapse monoliths
osv·2022-06-29
CVE-2022-31052 [HIGH] URL previews of unusual or maliciously-crafted pages can crash Synapse media repositories or Synapse monoliths
URL previews of unusual or maliciously-crafted pages can crash Synapse media repositories or Synapse monoliths
### Impact
URL previews of some web pages can exhaust the available stack space for the Synapse process due to unbounded recursion.
This is sometimes recoverable and leads to an error for the request causing the problem, but in other cases the Synapse process may crash altogether.
It is possible to exploit this maliciously, either by malicious users on the homeserver, or by remote users sending URLs that a local user's client may automatically request a URL preview for.
Remote users are not able to exploit this directly, because [the URL preview endpoint is authenticated](https://spec.matrix.org/v1.2/client-server-api/#get_matrixmediav3preview_url).
### Am I affected?
* deplo
GHSA
URL previews of unusual or maliciously-crafted pages can crash Synapse media repositories or Synapse monoliths
ghsa·2022-06-29
CVE-2022-31052 [HIGH] CWE-674 URL previews of unusual or maliciously-crafted pages can crash Synapse media repositories or Synapse monoliths
URL previews of unusual or maliciously-crafted pages can crash Synapse media repositories or Synapse monoliths
### Impact
URL previews of some web pages can exhaust the available stack space for the Synapse process due to unbounded recursion.
This is sometimes recoverable and leads to an error for the request causing the problem, but in other cases the Synapse process may crash altogether.
It is possible to exploit this maliciously, either by malicious users on the homeserver, or by remote users sending URLs that a local user's client may automatically request a URL preview for.
Remote users are not able to exploit this directly, because [the URL preview endpoint is authenticated](https://spec.matrix.org/v1.2/client-server-api/#get_matrixmediav3preview_url).
### Am I affected?
* deplo
OSV
CVE-2022-31052: Synapse is an open source home server implementation for the Matrix chat network
osv·2022-06-28·CVSS 6.5
CVE-2022-31052 [MEDIUM] CVE-2022-31052: Synapse is an open source home server implementation for the Matrix chat network
Synapse is an open source home server implementation for the Matrix chat network. In versions prior to 1.61.1 URL previews of some web pages can exhaust the available stack space for the Synapse process due to unbounded recursion. This is sometimes recoverable and leads to an error for the request causing the problem, but in other cases the Synapse process may crash altogether. It is possible to exploit this maliciously, either by malicious users on the homeserver, or by remote users sending URLs that a local user's client may automatically request a URL preview for. Remote users are not able to exploit this directly, because the URL preview endpoint is authenticated. Deployments with `url_preview_enabled: false` set in configuration are not affected. Deployments with `url_preview_enabled:
Debian
CVE-2022-31052: matrix-synapse - Synapse is an open source home server implementation for the Matrix chat network...
vendor_debian·2022·CVSS 6.5
CVE-2022-31052 [MEDIUM] CVE-2022-31052: matrix-synapse - Synapse is an open source home server implementation for the Matrix chat network...
Synapse is an open source home server implementation for the Matrix chat network. In versions prior to 1.61.1 URL previews of some web pages can exhaust the available stack space for the Synapse process due to unbounded recursion. This is sometimes recoverable and leads to an error for the request causing the problem, but in other cases the Synapse process may crash altogether. It is possible to exploit this maliciously, either by malicious users on the homeserver, or by remote users sending URLs that a local user's client may automatically request a URL preview for. Remote users are not able to exploit this directly, because the URL preview endpoint is authenticated. Deployments with `url_preview_enabled: false` set in configuration are not affected. Deployments with `url_preview_enabled:
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/matrix-org/synapse/commit/fa1308061802ac7b7d20e954ba7372c5ac292333https://github.com/matrix-org/synapse/security/advisories/GHSA-22p3-qrh9-cx32https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EARKKJZ2W7WUITFDT4EG4NVATFYJQHF/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGSDQ4YAITCUACAB7SXQZDJIU3IQ4CJD/https://spec.matrix.org/v1.2/client-server-api/#get_matrixmediav3preview_urlhttps://github.com/matrix-org/synapse/commit/fa1308061802ac7b7d20e954ba7372c5ac292333https://github.com/matrix-org/synapse/security/advisories/GHSA-22p3-qrh9-cx32https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EARKKJZ2W7WUITFDT4EG4NVATFYJQHF/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGSDQ4YAITCUACAB7SXQZDJIU3IQ4CJD/https://spec.matrix.org/v1.2/client-server-api/#get_matrixmediav3preview_url
2022-06-28
Published