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CVE-2022-23884 is an integer overflow vulnerability in Mojang Bedrock Dedicated Server version 1.18.2. The flaw exists in the PurchaseReceiptPacket::_read function, which is responsible for deserializing packet data. Improper handling of integer values during deserialization can result in an overflow, leading to a bounds check bypass.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a proof-of-concept (PoC) exploit for CVE-2022-23884, a denial-of-service vulnerability in Mojang Bedrock Dedicated Server versions 1.16.0 to 1.18.12. The vulnerability is due to improper handling of the PurchaseReceiptPacket::_read function, where a large value for a loop counter can cause the server to hang or crash. The exploit consists of a Python script (replay.py) that reads a file (purchase.pkt) containing a sequence of malicious UDP packets and sends them to a specified server IP and port. The README.md explains the vulnerability, usage instructions, and provides patch information. The exploit is network-based, targeting the server over UDP, and is intended to demonstrate the vulnerability by causing a DoS condition. The repository is structured simply, with one exploit script and a README; the actual malicious packet file (purchase.pkt) is not included.
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