154 lines
2.5 KiB
HTML
154 lines
2.5 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Don't Include Comments</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="Send Information Back Judiciously"
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HREF="output.html"><LINK
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REL="PREVIOUS"
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TITLE="Minimize Feedback"
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HREF="minimize-feedback.html"><LINK
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REL="NEXT"
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TITLE="Handle Full/Unresponsive Output"
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HREF="handle-full-output.html"></HEAD
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><BODY
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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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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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="minimize-feedback.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 9. Send Information Back Judiciously</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="handle-full-output.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="NO-COMMENTS"
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></A
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>9.2. Don't Include Comments</H1
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><P
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>When returning information, don't include any ``comments'' unless you're
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sure you want the receiving user to be able to view them.
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This is a particular problem for web applications that generate files
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(such as HTML).
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Often web application programmers wish to comment their work
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(which is fine), but instead of simply leaving the comment in their code,
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the comment is included as part of the generated file (usually HTML or XML)
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that is returned to the user.
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The trouble is that these comments sometimes provide insight into how
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the system works in a way that aids attackers.</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="minimize-feedback.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="handle-full-output.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Minimize Feedback</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="output.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Handle Full/Unresponsive Output</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |