Description - Multiple Vulnerabilities in PerlBlog

Multiple Vulnerabilities found in PerlBlog script.

Exploit

Available

Solution

Not available - check vendor's website

1. Arbitrary file creation with user-defined data.

Vulnerable script: weblog.pl
User-defined post variables are not properly sanitized. "reply" parameter may contain arbitrary filename. weblog.pl creates a file with "name" and "body" parameter values included.

System access is possible.


2. Directory traversal vulnerability.

Vulnerable script: weblog.pl
Input parameter "month" isn't properly sanitized. This can be used to read arbitrary txt-files.


3. Cross-Site Scripting vulnerability.

Vulnerable script: weblog.pl
Post variables "name" and "email" are not properly sanitized. This can be used to post arbitrary HTML or JavaScript code.