Bug 2035358 (CVE-2021-43518) - CVE-2021-43518 teeworlds: code execution via malicious map file
Summary: CVE-2021-43518 teeworlds: code execution via malicious map file
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-43518
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2035359 2035360
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-12-23 18:10 UTC by Marian Rehak
Modified: 2021-12-23 18:41 UTC (History)
4 users (show)

Fixed In Version:
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Last Closed: 2021-12-23 18:41:15 UTC

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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.
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