Bug 2018282 (CVE-2021-41177) - CVE-2021-41177 nextcloud: rate-limits not working on instances without configured memory cache backend
Summary: CVE-2021-41177 nextcloud: rate-limits not working on instances without config...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-41177
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2018283
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-10-28 17:52 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-28 20:07 UTC (History)
2 users (show)

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Last Closed: 2021-10-28 20:07:51 UTC

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Description Guilherme de Almeida Suckevicz 2021-10-28 17:52:03 UTC 
Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0, Nextcloud Server did not implement a database backend for rate-limiting purposes. Any component of Nextcloud using rate-limits (as as `AnonRateThrottle` or `UserRateThrottle`) was thus not rate limited on instances not having a memory cache backend configured. In the case of a default installation, this would notably include the rate-limits on the two factor codes. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5, or 22.2.0. As a workaround, enable a memory cache backend in `config.php`.

Reference:
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fj39-4qx4-m3f2
Comment 1 Guilherme de Almeida Suckevicz 2021-10-28 17:52:17 UTC 
Created nextcloud tracking bugs for this issue:

Affects: fedora-all [bug 2018283]
Comment 2 Product Security DevOps Team 2021-10-28 20:07:51 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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