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Kaillera Server version 0.86 contains a remote denial-of-service vulnerability in its UDP packet handling logic. After a client completes the initial handshake by sending a valid HELLO0.83 packet and receiving the server response, the server fails to properly validate subsequent UDP input. A malformed packet sent after this handshake state can trigger a crash, causing the service to become unresponsive. Based on the available information, the issue is caused by improper input validation in the server’s UDP packet handler and is exploitable by an unauthenticated remote attacker.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit auxiliary module targeting a denial of service (DoS) vulnerability in the Kaillera 0.86 server (CVE-2011-10020) on Windows. The exploit works by first sending a 'HELLO0.83' UDP packet to the target server on port 27888 (default), receiving a response to determine the correct port, and then sending a malformed UDP packet ('Kthxbai') to crash the server. The module then checks if the server is down by attempting another handshake. The code is written in Ruby and leverages Metasploit's UDP and DoS auxiliary modules. The only fingerprintable endpoint is the UDP service on port 27888. The exploit is operational and can reliably crash the targeted Kaillera server, resulting in a denial of service.
2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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