Bug 1921347 (CVE-2020-8150)

Summary:	CVE-2020-8150 nextcloud: Encryption scheme downgrade vulnerability
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
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
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2021-01-28 02:41:44 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1921348
Bug Blocks:

Description Pedro Sampaio 2021-01-27 22:21:00 UTC

A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.

http://seclists.org/fulldisclosure/2020/Dec/55
http://seclists.org/fulldisclosure/2020/Dec/57
http://seclists.org/fulldisclosure/2020/Dec/58
https://hackerone.com/reports/742588
https://nextcloud.com/security/advisory/?id=NC-SA-2020-039

Comment 1 Pedro Sampaio 2021-01-27 22:21:39 UTC

Created nextcloud tracking bugs for this issue:

Affects: fedora-all [bug 1921348]

Comment 2 Product Security DevOps Team 2021-01-28 02:41:44 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.