Bug 1641642 (CVE-2018-18541)

Summary:	CVE-2018-18541 teeworlds: Missing challenge-response in the connection build up
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gwync, igor.raits, lkundrak, oliver
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	teeworlds 0.6.5	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:40:48 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1641643, 1641644
Bug Blocks:

Description Andrej Nemec 2018-10-22 12:33:24 UTC

In Teeworlds before 0.6.5, connection packets could be forged. There was no challenge-response involved in the connection build up. A remote attacker could send connection packets from a spoofed IP address and occupy all server slots, or even use them for a reflection attack using map download packets.

Upstream issue:

https://github.com/teeworlds/teeworlds/issues/1536

References:

https://teeworlds.com/?page=news&id=12544

Comment 1 Andrej Nemec 2018-10-22 12:34:49 UTC

Created teeworlds tracking bugs for this issue:

Affects: epel-7 [bug 1641644]
Affects: fedora-all [bug 1641643]

Comment 2 Product Security DevOps Team 2019-06-10 10:40:48 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.