Bug 1660636 (CVE-2019-0548)

Summary:	CVE-2019-0548 Asp.NET Core: AspNetCoreModule WebSocket DOS
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	andrew.slice, bodavis, dbhole, drusso, kanderso, omajid, rjanekov, rwagner, security-response-team
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:	2019-09-27 09:38:29 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1660643

Description Laura Pardo 2018-12-18 21:25:43 UTC

Today, aborted websocket connections to keep an open connection between ANCM and Kestrel due to a bug with websocket disconnect detection. If continued, internal ports would be exhausted, causing the server to effectively be DDOS’d.

Comment 3 errata-xmlrpc 2019-01-09 08:52:51 UTC

This issue has been addressed in the following products:

  .NET Core on Red Hat Enterprise Linux

Via RHSA-2019:0040 https://access.redhat.com/errata/RHSA-2019:0040

Comment 4 Tomas Hoger 2019-03-31 14:57:22 UTC

References:

https://github.com/aspnet/Announcements/issues/335
https://github.com/aspnet/AspNetCore/issues/6488
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0548