154 lines
2.4 KiB
HTML
154 lines
2.4 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Command line</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Secure Programming for Linux and Unix HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Validate All Input"
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HREF="input.html"><LINK
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REL="PREVIOUS"
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TITLE="Validate All Input"
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HREF="input.html"><LINK
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REL="NEXT"
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TITLE="Environment Variables"
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HREF="environment-variables.html"></HEAD
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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>Secure Programming for Linux and Unix HOWTO</TH
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></TR
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><TR
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WIDTH="10%"
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>Prev</A
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WIDTH="80%"
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>Chapter 5. Validate All Input</TD
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WIDTH="10%"
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><A
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NAME="COMMAND-LINE"
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></A
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>5.1. Command line</H1
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><P
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>Many programs take input from the command line.
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A setuid/setgid program's command line data is provided by
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an untrusted user, so a setuid/setgid program must defend itself from
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potentially hostile command line values.
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Attackers can send just about any kind of data through a command line
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(through calls such as the execve(3) call).
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Therefore, setuid/setgid programs must completely
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validate the command line inputs and
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must not trust the name of the program reported by command line argument zero
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(an attacker can set it to any value including NULL).</P
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>Validate All Input</TD
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>Environment Variables</TD
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> |