Bug 1838528 (CVE-2020-8138)

Summary:	CVE-2020-8138 nextcloud: a Server-Side Request Forgery vulnerability when subscribing to a malicious calendar URL
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ichavero, 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:	2021-10-28 05:26:28 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:
Bug Depends On:	1838529, 1838530, 1838532
Bug Blocks:

Description Marian Rehak 2020-05-21 10:32:03 UTC

A missing check for IPv4 nested inside IPv6 in Nextcloud server < 17.0.1, < 16.0.7, and < 15.0.14 allowed a Server-Side Request Forgery (SSRF) vulnerability when subscribing to a malicious calendar URL.

Upstream Advisory:

https://nextcloud.com/security/advisory/?id=NC-SA-2020-014

Comment 1 Marian Rehak 2020-05-21 10:32:42 UTC

Created nextcloud tracking bugs for this issue:

Affects: epel-7 [bug 1838532]
Affects: fedora-30 [bug 1838529]
Affects: fedora-31 [bug 1838530]