Bug 1981820 (CVE-2021-32703)

Summary:	CVE-2021-32703 nextcloud: lack of ratelimit on shareinfo endpoint
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ce, james.hogarth
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Last Closed:	2021-07-13 21:55:08 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1981821
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2021-07-13 13:42:16 UTC

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the shareinfo endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.

Reference:
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-375p-cxxq-gc9p

Comment 1 Guilherme de Almeida Suckevicz 2021-07-13 13:42:53 UTC

Created nextcloud tracking bugs for this issue:

Affects: fedora-all [bug 1981821]

Comment 2 Product Security DevOps Team 2021-07-13 21:55:08 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.