|
VisitorBook LE Multiple Vulnerabilities
|
|
Secunia Advisory:
|
SA10412
|
|
|
Release Date:
|
2003-12-11
|
|
Popularity:
|
5,346 views
|
|
|
Critical:
|
Moderately critical
|
|
Impact:
|
Security Bypass
Cross Site Scripting
|
|
Where:
|
From remote
|
|
Solution Status:
|
Unpatched
|
|
| Software: | VisitorBook LE 1.x
|
|
|
Subscribe:
|
Instant alerts on relevant vulnerabilities 
|
|
Description:
Multiple vulnerabilities have been identified in VisitorBook LE, allowing malicious people to conduct Cross Site Scripting attacks or send SPAM mails anonymously.
If the "$mailuser" parameter is 1, it is possible to inject mail headers using line breaks through the email address. This can be exploited to alter the mail and send SPAM mails anonymously.
It is possible to cause a Denial of Service and fill the log file with empty entries by sending entries with a large number of line breaks (more than the number of entries, which the log can hold). This fills up the log and may cause the system to respond with internal server error messages.
The "do" parameter isn't properly verified in "visitorbook.pl", allowing malicious people to insert arbitrary characters. This can be exploited to conduct Cross Site Scripting attacks.
VisitorBook LE trusts responses from reverse DNS lookups. This can be exploited to use the VisitorBook anonymously by altering the response from the reverse record of the IP address.
Solution:
Set the "mailuser" parameter to "0". Edit the source code to ensure that input is validated before it is returned to the user or written to database files. Disable hostname lookups in your web server.
Provided and/or discovered by:
Paul Johnston
|
|
|
Track this Secunia Advisory
|
Customers of the Secunia Vulnerability Intelligence solutions will automatically receive updates when new information regarding this advisory is released.
Read more about our Vulnerability Intelligence solutions and what they can do for you and your company.
|
|
|
About this Secunia Advisory
|
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
|
