{"id":"CVE-2023-54392","aliases":["EUVD-2023-60622","GHSA-7wrv-6h42-w54f","GHSA-j32g-gv5r-qc39"],"status":"published","title":"PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket","description":"PocketMine-MP versions \u003e= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0053,"percentile":0.45303,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2023-07-14T21:50:42Z","modified":"2026-10-28T02:30:36Z","fixes":[{"ecosystem":"Packagist","package":"pocketmine/pocketmine-mp","fixed_in":["4.22.3","5.2.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"pocketmine/pocketmine-mp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"4.22.3"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"pocketmine/pocketmine-mp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.2.1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"pocketmine/pocketmine-mp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"4.22.3"}]}],"versions":["4.20.0","4.20.1","4.20.2","4.20.3","4.20.4","4.20.5","4.21.0","4.21.1","4.22.0","4.22.1","4.22.2"]},{"source":"osv","ecosystem":"Packagist","package":"pocketmine/pocketmine-mp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.2.1"}]}],"versions":["5.0.0","5.0.1","5.1.0","5.1.1","5.1.2","5.1.3","5.2.0"]}],"products":[{"vendor":"pmmp","product":"pocketmine-mp"}],"references":[{"url":"https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-7wrv-6h42-w54f","tags":["vendor-advisory","advisory","web"]},{"url":"https://github.com/pmmp/PocketMine-MP/commit/0c250a2ef09627b48aa52302f6cc7e1f2afb70ea","tags":["patch","fix","web"]},{"url":"https://www.vulncheck.com/advisories/pocketmine-mp-before-4.22.3-denial-of-service-via-blockactordatapacket","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/advisories/GHSA-7wrv-6h42-w54f"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54392","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-j32g-gv5r-qc39"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54392.json","tags":["advisory"]},{"url":"https://github.com/pmmp/PocketMine-MP","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-54392","title":"PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket","description":"PocketMine-MP versions \u003e= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.","status":"published","published":"2026-09-09T13:31:51.436Z","modified":"2026-10-08T15:21:06.823Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:35:15.066338Z"}],"euvd":[{"id":"EUVD-2023-60622","description":"PocketMine-MP versions \u003e= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.","status":"published","published":"2026-09-09T13:31:51Z","modified":"2026-10-08T15:21:06Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:27:32.18003Z"}],"ghsa":[{"id":"GHSA-7wrv-6h42-w54f","title":"PocketMine-MP vulnerable to server crash using badly formatted sign NBT in BlockActorDataPacket","description":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag-\u003egetCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler-\u003ehandleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket-\u003ehandle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a sign. This packet should contain an NBT with incorrect types but correct architecture.\n\n### Impact\nThis makes it possible to shutdown a server for someone who knows how to operate it. As this was discovered in 4.22.1, everyone with at least this version is affected.\n\n### Patches\nThis bug was fixed by 0c250a2ef09627b48aa52302f6cc7e1f2afb70ea in the 4.22.3 and 5.2.1 releases.\n\n### Workarounds\nA plugin may be able to handle `DataPacketReceiveEvent` for `BlockActorDataPacket`, and verify that the `FrontText` tag is a `TAG_Compound`.","status":"published","published":"2023-07-14T21:50:42Z","modified":"2023-07-14T21:50:43Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T14:36:57.310051Z"},{"id":"GHSA-j32g-gv5r-qc39","title":"PocketMine-MP versions \u003e= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to...","description":"PocketMine-MP versions \u003e= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.","status":"published","published":"2026-09-09T15:35:10Z","modified":"2026-09-09T15:35:10Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:11:38.712835Z"}],"nvd":[{"id":"CVE-2023-54392","description":"PocketMine-MP versions \u003e= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.","status":"published","published":"2026-09-09T14:17:09.307Z","modified":"2026-10-08T16:16:47.85Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:09:27.733183Z"}],"osv":[{"id":"CVE-2023-54392","title":"PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket","description":"PocketMine-MP versions \u003e= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.","status":"published","published":"2026-09-09T13:31:51.436Z","modified":"2026-10-28T02:30:36.742232422Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:44:36.851042Z"},{"id":"GHSA-7wrv-6h42-w54f","title":"PocketMine-MP vulnerable to server crash using badly formatted sign NBT in BlockActorDataPacket","description":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag-\u003egetCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler-\u003ehandleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket-\u003ehandle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a sign. This packet should contain an NBT with incorrect types but correct architecture.\n\n### Impact\nThis makes it possible to shutdown a server for someone who knows how to operate it. As this was discovered in 4.22.1, everyone with at least this version is affected.\n\n### Patches\nThis bug was fixed by 0c250a2ef09627b48aa52302f6cc7e1f2afb70ea in the 4.22.3 and 5.2.1 releases.\n\n### Workarounds\nA plugin may be able to handle `DataPacketReceiveEvent` for `BlockActorDataPacket`, and verify that the `FrontText` tag is a `TAG_Compound`.","status":"published","published":"2023-07-14T21:50:42Z","modified":"2026-09-10T03:56:07.870772994Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:46:41.732368Z"}]}}