Bug 1977201 (CVE-2021-22915) - CVE-2021-22915 nextcloud: lack of inclusion of IPv6 subnets in rate-limiting considerations allows brute force attacks
Summary: CVE-2021-22915 nextcloud: lack of inclusion of IPv6 subnets in rate-limiting ...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-22915
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: 1977202
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-06-29 08:04 UTC by Marian Rehak
Modified: 2021-06-29 10:42 UTC (History)
2 users (show)

Fixed In Version: nextcloud 19.0.11, nextcloud 20.0.10, nextcloud 21.0.2
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Last Closed: 2021-06-29 10:42:12 UTC
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Description Marian Rehak 2021-06-29 08:04:02 UTC 
Nextcloud server before 19.0.11, 20.0.10, 21.0.2 is vulnerable to brute force attacks due to lack of inclusion of IPv6 subnets in rate-limiting considerations. This could potentially result in an attacker bypassing rate-limit controls such as the Nextcloud brute-force protection.

References:

https://nextcloud.com/security/advisory/?id=NC-SA-2021-009
https://hackerone.com/reports/1154003
Comment 1 Marian Rehak 2021-06-29 08:04:52 UTC 
Created nextcloud tracking bugs for this issue:

Affects: fedora-all [bug 1977202]
Comment 2 Product Security DevOps Team 2021-06-29 10:42:12 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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