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ISC DHCP versions 4.1 before 4.1.1-P1 and 4.0 before 4.0.2-P1 are vulnerable to a denial of service condition when processing DHCP requests containing a zero-length client ID. The vulnerability allows a remote attacker to send a specially crafted DHCP packet with a zero-length client ID, causing the DHCP server process to exit unexpectedly. This is due to improper input validation when handling the client ID field.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a single Metasploit auxiliary module (Ruby) that exploits a denial-of-service vulnerability (CVE-2010-2156) in ISC DHCP server versions 4.1 before 4.1.1-P1 and 4.0 before 4.0.2-P1. The module crafts and sends a DHCP request with a zero-length client_id option to the target DHCP server, causing it to crash due to improper handling of the malformed packet. The exploit is operational and requires the attacker to specify a valid IP address to request (RIP) and to have network access to the DHCP server. The main attack vector is network-based, targeting the DHCP service (UDP port 67) via broadcast (255.255.255.255) or directly to the server. The code is structured as a typical Metasploit module, with clear separation of initialization, option registration, and the main exploit logic.
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