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Roundup: [oss-security] Persistent XSS Vulnerability in Wordpress plugin AnyVar v0.1.1 #112

Closed grahamc closed 7 years ago

grahamc commented 7 years ago

Here is a report from the oss-security mailing list for Vulnerability Roundup 27.

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Instructions:

Identification

Identify if we have the software, in 16.09, 17.03, and unstable. Then determine if we are vulnerable, and make a comment with your findings. It can also be helpful to specify if you think there is a patch, or if it can be fixed via a general update.

Example:

unstable: we are not vulnerable (link to the package)
17.03: we are vulnerable (link to the package)
16.09: we don't have it packaged

IMPORTANT: If you believe there are possibly related issues, bring them up on the parent issue!

Patching

Start by commenting on this issue saying you're working on a patch. This way, we don't duplicate work.

If you open a pull request, tag this issue and the master issue for the roundup.

If you commit the patch directly to a branch, please leave a comment on this issue with the branch and the commit hash, example:

fixed:

release-16.09: abc123

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Upon Completion ...

Info

Triage Indicator:

-needs-triage +roundup27 thread:0000000000003ea0

Should the search term be changed from wordpress? Suggest a new package search by commenting:

-suggested:wordpress +suggested:correctPackageName thread:0000000000003ea0

Known CVEs: CVE-2017-6103

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Wed, 01 Mar 2017 04:39:21 -0500 "Larry W. Cashdollar" , 2DC459E9-2A8F-45E1-8D1C-7AC78F3BCADB@me.com
Title: Persistent XSS Vulnerability in Wordpress plugin AnyVar v0.1.1
Author: Larry W. Cashdollar, @_larry0
Date: 2017-02-21
Download Site: https://wordpress.org/plugins/anyvar
Vendor: https://profiles.wordpress.org/matt_dev/
Vendor Notified: 2017-02-28
Vendor Contact: plugins@wordpress.org
Description: AnyVar is a simple search and replace plugin. It lets you add changeable variables (text snippets) to posts, sidebars, widgets, links & themes.
Vulnerability:
$var_name and $var_text aren't sanitized before being sent to the webpage.  $var_name only can contain text so only $var_text is exploitable
In file ./anyvar/anyvar.php:

202                         echo "<tr id='anyvar-$var_name' $class>
203                                 <th scope='row' class='check-column'><input     type='checkbox' name='delete[]' value='$var_name' /></th>
204                                 <td><a class='row-title' href='?page=".$_GET    ['page']."&action=edit&amp;var=$var_name' title='Edit &quot;$var_name&quot;'    > $var_name</a></td>
205                                 <td>[$var_name]</td>
206                                 <td><textarea name='anyvar_text_$var_name' i    d='anyvar_text_$var_name' cols='60' rows='3' readonly>$var_text</textarea></    td>

CVE-ID: CVE-2017-6103
Exploit Code:
    • In the text field box the following will trigger a JS alert popup:
    •  
    • </textarea><script>alert(1);</script><textarea>
Screen Shots: [http://www.vapidlabs.com/m/xssvar.png]
Advisory: http://www.vapidlabs.com/advisory.php?v=177

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Mic92 commented 7 years ago

unstable: we don't have it packaged 17.03: we don't have it packaged 16.09: we don't have it packaged

grahamc commented 7 years ago

Thank you!