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Synology DiskStation Manager (DSM) contains an arbitrary file-append vulnerability in webman/imageSelector.cgi. In DSM 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1, a remote attacker can supply a pathname through the SLICEUPLOAD X-TMP-FILE HTTP header to append data to an arbitrary file. This file-write primitive can consequently be used to execute arbitrary code.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module targeting Synology DiskStation Manager (DSM) 4.x (CVE-2013-6955). The exploit leverages an unauthenticated command injection vulnerability in the SLICEUPLOAD functionality of /webman/imageSelector.cgi, allowing arbitrary shell commands to be appended to /usr/syno/synoman/redirect.cgi, a shell script. The attacker then triggers execution of these commands by sending a GET request to /redirect.cgi. The module includes version detection logic via /webman/info.cgi and only attempts exploitation on vulnerable versions. The payload is customizable and executed as root, providing full control over the target system. The exploit is operational and can be used to gain remote command execution on affected Synology NAS devices without authentication. The code is written in Ruby and is structured as a standard Metasploit exploit module.
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