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CVE-2023-28528 is a command injection vulnerability in the invscout setUID binary on IBM AIX versions 7.1, 7.2, 7.3, and VIOS 3.1. The vulnerability arises from improper neutralization of special elements in OS command construction, specifically when an undocumented parameter is used to install arbitrary RPMs via the system() function. This allows a non-privileged local user to execute arbitrary commands with elevated privileges, leading to privilege escalation. The vulnerability was discovered by Tim Brown (Cisco Security Advisory EMEAR) and is tracked as TALOS-2023-1691.
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This repository contains a single Metasploit module (modules/exploits/aix/local/invscout_rpm_priv_esc.rb) that exploits a local privilege escalation vulnerability (CVE-2023-28528) in the IBM AIX invscout utility (version 7.2 and earlier). The exploit leverages undocumented command-line arguments (-rpm and -o) to inject arbitrary commands into the rpm utility, which is executed with root privileges. The module is written in Ruby and is designed to be used within the Metasploit framework. It allows an attacker with local access to the system to execute arbitrary commands as root, resulting in a shell or meterpreter session with elevated privileges. The only fingerprintable endpoint is the invscout binary, typically located at /usr/sbin/invscout. The exploit is operational and provides a working privilege escalation method for affected AIX systems.
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