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A command injection vulnerability exists in the fetch_url function in usr.bin/ftp/fetch.c in tnftp, as used in NetBSD versions 5.1 through 6.1.5. The vulnerability allows remote attackers to execute arbitrary commands by including a pipe (|) character at the end of an HTTP redirect, which is improperly handled by the fetch_url function.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a single Metasploit module (modules/exploits/unix/http/tnftp_savefile.rb) that exploits an arbitrary command execution vulnerability in tnftp (CVE-2014-8517). The exploit works by running a malicious HTTP server that serves a specially crafted resource. When a vulnerable tnftp client fetches this resource without the -o option, the output filename is resolved from the last component of the URL. If this filename begins with a pipe (|) character, tnftp will execute the command following the pipe using popen(). The module detects tnftp clients by their User-Agent and serves a payload that results in arbitrary command execution on the client system. The exploit is weaponized, as it is part of the Metasploit framework and allows for customizable payloads. The main attack vector is network-based, targeting tnftp clients that connect to the attacker's HTTP server.
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1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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Community discussion across Reddit, Mastodon, and other social sources.