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Serious Vulnerabilities In PhotoPost Classifieds
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January 1, 2022
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Description:
Add a full-featured user-to-user classified ads system to your
website to connect buyers with sellers. No matter what your users
interestes may be, they likely want to buy and sell items related
to your site's topic, and PhotoPost Classifieds makes it easy.
PhotoPost Classifieds is designed to integrate seamlessly into
your current site design, and can even use your existing forum
user database (if you have one) for one central login. Where you
see [INT] in this advisory, it represents an integer such as a
valid category. [XSS] and [SQL] represent where an attacker could
insert code to conduct a cross site scripting attack, or inject
data to influence SQL queries.
Cross Site Scripting:
PhotoPost Classifieds is prone to cross site scripting in several
different scripts throughout the application. Below are examples:
http://path/showcat.php?si=[XSS]
http://path/reportproduct.php?report=[XSS]
http://path/contact.php?contact=[INT]&productid;=[INT][XSS]
This can be used to render hostile code in the context of the
victims browser, or to steal cookie based credentials or other
sensitive info.
SQL Injection Vulnerability:
There are a substantial number of SQL Injection vulnerabilities in
this application. Some are easy to exploit, others are not so easy.
http://path/showproduct.php?product=[INT][SQL]
http://path/contact.php?contact=[INT]&productid;=[INT][SQL]
http://path/addfav.php?product=[INT][SQL]&do;=add
http://path/showproduct.php?product=[INT]&sort;=[INT][SQL]&cat;=[INT]
http://path/showcat.php?cat=[INT][SQL]
http://path/index.php?cat=[INT][SQL]
http://path/comments.php?product=[INT]&cedit;=[INT][SQL]
These SQL issues can possibly be exploited to influence SQL queries
and disclose arbitrary data. These will alse cause XSS if unsuccessful.
Arbitrary File Upload:
This issue can be very dangerous as it allows a user to upload php
scripts and other files. Once uploaded these files can be executed
with the permission of the webserver. The uploaded file can be found
by following the image link in the classified ad that was posted.
Exploiting this vulnerability can be accomplished by naming a file with
multiple file extensions and then uploading it when placing an ad (for
example: test.jpg.php.jpg.php). It should be noted that the uploads are
properly filtered (or seem to be) when editing an ad, just not when
creating a new classified ad.
Solution:
PhotoPost Classifieds 2.02 has been released to resolve these issues. All
users should upgrade their PhotoPost Classifieds immediately.
Credits:
James Bercegay of the GulfTech Security Research Team
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