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A vulnerability in haserl, a component of the Alpine Linux Configuration Framework before version 0.9.36, allows local users to read the contents of any file on the filesystem due to a lack of proper verification. The flaw arises from insufficient access control or input validation, enabling unauthorized file access.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit post-exploitation module targeting the haserl utility on Linux systems (prior to version 0.9.36, CVE-2021-29133). The module is designed to be run after gaining a shell or meterpreter session on a target. It searches for setuid haserl-lua binaries in /usr/bin, and if found, uses them to read arbitrary files (default: /etc/shadow). The contents of the file are then saved as loot for later analysis. The exploit is operational, requiring a specific local configuration (presence of a vulnerable setuid binary) and does not provide remote code execution, but rather arbitrary file read capabilities. The code is written in Ruby and is structured as a standard Metasploit post module.
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