{"id":"CVE-2021-43518","aliases":["DEBIAN-CVE-2021-43518","EUVD-2021-30447","GHSA-53xw-cwmg-3m36","MGASA-2022-0292","UBUNTU-CVE-2021-43518"],"status":"published","title":"Teeworlds up to and including 0.7.5 is vulnerable to Buffer Overflow. A map parser does not...","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.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01427,"percentile":0.73197,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-120"],"published":"2021-12-15T14:33:05Z","modified":"2026-10-23T18:04:16Z","fixes":[{"ecosystem":"Debian:12","package":"teeworlds","fixed_in":["0.7.5-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"teeworlds","fixed_in":["0.7.5-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"teeworlds","fixed_in":["0.7.5-2"],"sources":["osv"]},{"ecosystem":"Mageia:8","package":"teeworlds","fixed_in":["0.7.5-1.1.mga8"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"teeworlds","fixed_in":["0.7.5-2"],"sources":["osv"]},{"ecosystem":"Ubuntu:25.10","package":"teeworlds","fixed_in":["0.7.5-2"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"teeworlds","fixed_in":["0.7.5-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"teeworlds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"teeworlds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"teeworlds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-2"}]}]},{"source":"osv","ecosystem":"Mageia:8","package":"teeworlds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-1.1.mga8"}]}]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"teeworlds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.2-5","0.7.2-5ubuntu1","0.7.2-5ubuntu1.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"teeworlds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.5-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"teeworlds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-2"}]}]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"teeworlds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-2"}]}]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"teeworlds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-2"}]}]}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"teeworlds","product":"teeworlds"}],"references":[{"url":"https://github.com/teeworlds/teeworlds/issues/2981","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"https://mmmds.pl/fuzzing-map-parser-part-1-teeworlds/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OS2LI2RHQNUKUT3FKWYHRC27PLRWCHMZ/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIYZ7EVY6NZBM7FQF6GVUARYO6MKSEAT/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43518"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JIYZ7EVY6NZBM7FQF6GVUARYO6MKSEAT/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OS2LI2RHQNUKUT3FKWYHRC27PLRWCHMZ/"},{"url":"https://github.com/advisories/GHSA-53xw-cwmg-3m36"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-43518","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2022-0292.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=30717","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/JIYZ7EVY6NZBM7FQF6GVUARYO6MKSEAT/","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2021-43518","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-43518","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-43518","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.","status":"published","published":"2021-12-15T14:33:05Z","modified":"2024-08-04T03:55:29.318Z","updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-30447","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.","status":"published","published":"2021-12-15T14:33:05Z","modified":"2024-08-04T03:55:29Z","updated_at":"2026-11-03T03:24:13.772922Z"}],"ghsa":[{"id":"GHSA-53xw-cwmg-3m36","title":"Teeworlds up to and including 0.7.5 is vulnerable to Buffer Overflow. A map parser does not...","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.","status":"published","published":"2021-12-16T00:01:47Z","modified":"2023-01-27T05:02:39Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:42:04.742793Z"}],"nvd":[{"id":"CVE-2021-43518","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.","status":"published","published":"2021-12-15T15:15:10.857Z","modified":"2026-06-17T04:11:03.55Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:07:02.189991Z"}],"osv":[{"id":"CVE-2021-43518","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.","status":"published","published":"2021-12-15T15:15:10.857Z","modified":"2026-10-20T10:54:08.033989811Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"DEBIAN-CVE-2021-43518","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.","status":"published","published":"2021-12-15T15:15:10.857Z","modified":"2026-10-23T18:04:16.442305301Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.799676Z"},{"id":"UBUNTU-CVE-2021-43518","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.","status":"published","published":"2021-12-15T15:15:00Z","modified":"2026-05-20T16:05:19.05505141Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"MGASA-2022-0292","title":"Updated teeworlds packages fix security vulnerability","description":"Code execution via malicious map file (CVE-2021-43518)\n","status":"published","published":"2022-08-20T10:04:13Z","modified":"2026-04-16T04:42:09.518214973Z","updated_at":"2026-11-02T15:49:42.263076Z"}]}}