{"id":"GHSA-fm35-jgg3-3grx","aliases":["CVE-2021-48007"],"title":"NaN/INF in serverbound movement packets can crash clients and servers","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"HIGH","description":"### Impact\nA malicious client may send a `MovePlayerPacket` to the server whose position or rotation contains NaN or INF. Since neither the server nor vanilla client handles this properly, a number of interesting side effects come into play.\n\n- The server may crash in various ways if this exploit is used, because some mathematical operations on NaN/INF generate PHP warnings, which are converted into exceptions.\n- Clients may not be able to see other clients who have a NaN/INF rotation.\n- Clients may also crash in such cases.\n\n### Patches\nA patch for this was included in the 3.18.1 release: https://github.com/pmmp/PocketMine-MP/commit/fb20bb38327b4c08ee3976640cd0dd547388a638\n\n### Workarounds\nWorkarounds could be implemented as plugins using `DataPacketReceiveEvent` to block any inbound movement packets containing bogus values.\n\n### For more information\nIf you have any questions or comments about this advisory:\n\n- Open an issue in [pmmp/PocketMine-MP](https://github.com/pmmp/PocketMine-MP)\n- Email us at [team@pmmp.io](mailto:team@pmmp.io)","severity":"high","score":7.5,"published":"2022-03-18T17:54:38.000Z","modified":"2026-09-08T12:38:20.146Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"pocketmine/pocketmine-mp","sources":[{"name":"OSV · GHSA-fm35-jgg3-3grx","url":"https://osv.dev/vulnerability/GHSA-fm35-jgg3-3grx"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"3.18.1"}],"type":"ECOSYSTEM"}],"versions":["3.0.0","3.0.1","3.0.10","3.0.11","3.0.12","3.0.2","3.0.3","3.0.4","3.0.5","3.0.6","3.0.7","3.0.8","3.0.9","3.1.0","3.1.1","3.1.2","3.1.3","3.1.4","3.1.5","3.1.6","3.1.7","3.1.8","3.10.0","3.10.1","3.11.0","3.11.1","3.11.2","3.11.3","3.11.4","3.11.5","3.11.6","3.11.7","3.12.0","3.12.1","3.12.2","3.12.3","3.12.4","3.12.5","3.12.6","3.13.0","3.13.1","3.14.0","3.14.1","3.14.2","3.14.3","3.15.0","3.15.1","3.15.2","3.15.3","3.15.4","3.16.0","3.16.1","3.17.0","3.17.1","3.17.2","3.17.3","3.17.4","3.17.5","3.17.6","3.17.7","3.18.0","3.2.0","3.2.1","3.2.2","3.2.3","3.2.4","3.2.5","3.2.6","3.2.7","3.3.0","3.3.1","3.3.2","3.3.3","3.3.4","3.4.0","3.4.1","3.4.2","3.4.3","3.5.0","3.5.1","3.5.10","3.5.11","3.5.12","3.5.13","3.5.2","3.5.3","3.5.4","3.5.5","3.5.6","3.5.7","3.5.8","3.5.9","3.6.0","3.6.1","3.6.2","3.6.3","3.6.4","3.6.5","3.6.6","3.7.0","3.7.1","3.7.2","3.7.3","3.8.0","3.8.1","3.8.2","3.8.3","3.8.4","3.8.5","3.8.6","3.8.7","3.9.0","3.9.1","3.9.2","3.9.3","3.9.4","3.9.5","3.9.6","3.9.7","3.9.8"],"fixed":["3.18.1"]}],"sourceAffected":[],"references":["https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-fm35-jgg3-3grx"],"sources":[{"name":"OSV","id":"GHSA-fm35-jgg3-3grx","modified":"2026-09-08T12:38:20.146053905Z","url":"https://osv.dev/vulnerability/GHSA-fm35-jgg3-3grx"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T03:25:32.145Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}