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CVE-2011-4040 is a stack/heap memory corruption issue in the MiniSmtp 3.0.11818 component shipped with NJStar Communicator. A remote attacker can trigger a buffer overflow by sending a crafted network packet to the MiniSmtp server, resulting in memory corruption that can be leveraged to execute arbitrary code in the context of the MiniSmtp service.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (2 hidden).
This repository contains a single Metasploit module (modules/exploits/windows/smtp/njstar_smtp_bof.rb) that exploits a stack buffer overflow vulnerability in the MiniSMTP server component of NJStar Communicator version 3.00 and prior. The exploit targets Windows XP SP2/SP3 and Windows Server 2003 (SP0/SP1/SP2) systems running the vulnerable MiniSMTP service, which listens on TCP port 25. The module uses an egghunter technique to deliver and execute a customizable payload (such as a reverse shell) on the target system. The exploit is operational and allows for remote code execution with the privileges of the MiniSMTP process. The module includes detection logic to identify the NJStar SMTP service and references CVE-2011-4040. The only fingerprintable network endpoint is TCP port 25 on the target host. The repository is structured as a typical Metasploit exploit module written in Ruby.
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