Bug 2035358 (CVE-2021-43518)

Summary:	CVE-2021-43518 teeworlds: code execution via malicious map file
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
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:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-12-23 18:41:15 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:	2035359, 2035360
Bug Blocks:

Description Marian Rehak 2021-12-23 18:10:07 UTC

Teeworlds up to and including 0.7.5 is vulnerable to Buffer Overflow. A map parser does not validate m_Channels value coming from a map file, leading to a buffer overflow. A malicious server may offer a specially crafted map that will overwrite client's stack causing denial of service or code execution.

Reference:

https://mmmds.pl/fuzzing-map-parser-part-1-teeworlds/
https://github.com/teeworlds/teeworlds/issues/2981

Comment 1 Marian Rehak 2021-12-23 18:10:24 UTC

Created teeworlds tracking bugs for this issue:

Affects: epel-7 [bug 2035360]
Affects: fedora-all [bug 2035359]

Comment 2 Product Security DevOps Team 2021-12-23 18:41:13 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.