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CVE-2023-25826 is a critical unauthenticated remote code execution vulnerability affecting OpenTSDB versions up to and including 2.4.1. The flaw resides in the legacy HTTP query and graphing API, specifically the /q endpoint, where attacker-controlled parameters are insufficiently validated before being incorporated into a gnuplot script. In the described exploitation path, the key parameter is written into the generated gnuplot script without effective sanitization, allowing an attacker to inject a crafted gnuplot system() directive and execute operating system commands on the OpenTSDB host. The issue stems from incomplete remediation of CVE-2020-35476: regex-based input restrictions added to the legacy query API do not correctly prevent malicious input from bypassing validation.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (modules/exploits/linux/http/opentsdb_key_cmd_injection.rb) that exploits an unauthenticated command injection vulnerability in OpenTSDB versions 2.4.1 and below (CVE-2023-36812, CVE-2023-25826). The exploit leverages the 'key' parameter in a graph plotting HTTP GET request to inject and execute arbitrary commands as root on the target system. The module first verifies the target is running a vulnerable version of OpenTSDB, then enumerates available metrics and aggregators, and finally delivers the payload via a crafted HTTP request. The default payload is a Meterpreter reverse shell, but any command payload supported by Metasploit can be used. The exploit is weaponized, requiring no authentication and providing reliable remote code execution. The only file in the repository is the Metasploit module itself, written in Ruby, and it is fully operational for use within the Metasploit framework.
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