{"id":"UBUNTU-CVE-2021-43518","details":"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.","modified":"2026-05-20T16:05:19.055051410Z","published":"2021-12-15T15:15:00Z","upstream":["CVE-2021-43518"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-43518"},{"type":"REPORT","url":"https://github.com/teeworlds/teeworlds/issues/2981"},{"type":"REPORT","url":"https://mmmds.pl/fuzzing-map-parser-part-1-teeworlds/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-43518"}],"affected":[{"package":{"name":"teeworlds","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/teeworlds?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.2-5","0.7.2-5ubuntu1","0.7.2-5ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"teeworlds","binary_version":"0.7.2-5ubuntu1.1"},{"binary_name":"teeworlds-data","binary_version":"0.7.2-5ubuntu1.1"},{"binary_version":"0.7.2-5ubuntu1.1","binary_name":"teeworlds-server"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43518.json"}},{"package":{"name":"teeworlds","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/teeworlds?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.5-1"],"ecosystem_specific":{"binaries":[{"binary_name":"teeworlds","binary_version":"0.7.5-1"},{"binary_version":"0.7.5-1","binary_name":"teeworlds-data"},{"binary_name":"teeworlds-server","binary_version":"0.7.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43518.json"}},{"package":{"name":"teeworlds","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/teeworlds?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-2"}]}],"ecosystem_specific":{"binaries":[{"binary_version":"0.7.5-2","binary_name":"teeworlds"},{"binary_name":"teeworlds-data","binary_version":"0.7.5-2"},{"binary_name":"teeworlds-server","binary_version":"0.7.5-2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43518.json"}},{"package":{"name":"teeworlds","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/teeworlds?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-2"}]}],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.7.5-2","binary_name":"teeworlds"},{"binary_name":"teeworlds-data","binary_version":"0.7.5-2"},{"binary_version":"0.7.5-2","binary_name":"teeworlds-server"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43518.json"}},{"package":{"name":"teeworlds","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/teeworlds?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-2"}]}],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.7.5-2","binary_name":"teeworlds"},{"binary_name":"teeworlds-data","binary_version":"0.7.5-2"},{"binary_version":"0.7.5-2","binary_name":"teeworlds-server"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43518.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}