CVE-2021-43518: Buffer Overflow
First published: Wed Dec 15 2021(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Teeworlds | <=0.7.5 | |
| Fedora | =35 | |
| Fedora | =36 |
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Reference Links
- https://github.com/teeworlds/teeworlds/issues/2981
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JIYZ7EVY6NZBM7FQF6GVUARYO6MKSEAT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OS2LI2RHQNUKUT3FKWYHRC27PLRWCHMZ/
- https://mmmds.pl/fuzzing-map-parser-part-1-teeworlds/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OS2LI2RHQNUKUT3FKWYHRC27PLRWCHMZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIYZ7EVY6NZBM7FQF6GVUARYO6MKSEAT/
Frequently Asked Questions
What is the severity of CVE-2021-43518?
CVE-2021-43518 has a high severity due to its potential for causing denial of service and remote code execution.
How do I fix CVE-2021-43518?
To fix CVE-2021-43518, update Teeworlds to version 0.7.6 or later.
What causes the vulnerability CVE-2021-43518?
CVE-2021-43518 is caused by a buffer overflow in the map parser due to unvalidated m_Channels values.
Which versions of Teeworlds are affected by CVE-2021-43518?
CVE-2021-43518 affects Teeworlds versions up to and including 0.7.5.
Is CVE-2021-43518 specific to certain operating systems?
CVE-2021-43518 is noted for being a risk on Fedora versions 35 and 36 that use the vulnerable Teeworlds software.
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