What’s Vulnerable › Vulnerabilities

CVE-2021-43518

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-15 · updated 2026-06-17
• Weakness: CWE-120

Description

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.

Affected products

• Fedoraproject Fedora: 35, 36
• Teeworlds: through 0.7.5

References

• https://github.com/teeworlds/teeworlds/issues/2981
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIYZ7EVY6NZBM7FQF6GVUARYO6MKSEAT/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OS2LI2RHQNUKUT3FKWYHRC27PLRWCHMZ/
• https://mmmds.pl/fuzzing-map-parser-part-1-teeworlds/
• https://github.com/teeworlds/teeworlds/issues/2981
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIYZ7EVY6NZBM7FQF6GVUARYO6MKSEAT/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OS2LI2RHQNUKUT3FKWYHRC27PLRWCHMZ/
• https://mmmds.pl/fuzzing-map-parser-part-1-teeworlds/

Get alerted when CVE-2021-43518 or the next vulnerability affects your stack