Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

ABTV //

Malware

End of Bibblio RCM includes -->
4/9/2019
09:10 AM
Larry Loeb
Larry Loeb
Larry Loeb

WordPress Vulnerable to SQL Injection

Security firm Securi has found out that on WordPress versions earlier than 3.4 it will allow an SQL injection vulnerability to occur.

Duplicate Page is an open source pluginfor WordPress that does just what you think it will do. It duplicates pages. There are over 800,000 installations of the plugin. It will duplicate pages, posts and custom posts with one click also saving the selected options (draft, private, public, pending).

But security firm Securi has found out that on WordPress versions earlier than 3.4, it will also allow an SQL injection vulnerability to occur.

The bug is important because it is exploitable by any user with an account on the vulnerable site regardless of the privileges they may have (that means subscribers) and is easy to exploit. This bug can allow attackers to steal sensitive user information such as password hashes. It could also lead to a complete compromise of the vulnerable WordPress installation.

Depending on what other plugins are active on the site, this bug can be forced into a PHP Object Injection vulnerability.

Digging a little deeper here, it can been seen that the plugin relies on an admin_action_ hook which is executed at the very end of wp-admin/admin.php. This means that it may be executed when any kind of user is on their dashboard, or even when they are editing their personal information.

A plugin that uses this kind of syntax should routinely do additional privilege and nonce checks to verify that it is not executed by less privileged malicious users.

But that checking does not seem to be happening.

The variable $post_id of the post to be duplicated is assumed to be an integer. That means no matter what value is in $post_id, it will retrieve a valid post if the contents start with the post's ID. For example, "456 garbage" in the $post_id would grab a post whose ID is 456.

There's more. $post_id is directly appended to the $wpdb->get_results() query. Since $post_id can contain unsanitized user input (the "garbage" we added), this means there is an SQL Injection vulnerability.

The values returned by this vulnerable query are re-used in a foreach() loop and are re-appended in the subsequent INSERT SQL query. This means that an attacker can inject arbitrary values in the postmeta table. There you have the elements needed for a PHP Object Injection attack.

Pulling back from the low-levels mechanisms here, what can be done to mitigate?

First, get Duplicate Page 3.4 or better. This bug was first fixed in that release. Also, version 3.5 of the Duplicate Page plug is advised, since it has been tested and checked for the absence of the vulnerability.

— Larry Loeb has written for many of the last century's major "dead tree" computer magazines, having been, among other things, a consulting editor for BYTE magazine and senior editor for the launch of WebWeek.

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Edge-DRsplash-10-edge-articles
I Smell a RAT! New Cybersecurity Threats for the Crypto Industry
David Trepp, Partner, IT Assurance with accounting and advisory firm BPM LLP,  7/9/2021
News
Attacks on Kaseya Servers Led to Ransomware in Less Than 2 Hours
Robert Lemos, Contributing Writer,  7/7/2021
Commentary
It's in the Game (but It Shouldn't Be)
Tal Memran, Cybersecurity Expert, CYE,  7/9/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Improving Enterprise Cybersecurity With XDR
Enterprises are looking at eXtended Detection and Response technologies to improve their abilities to detect, and respond to, threats. While endpoint detection and response is not new to enterprise security, organizations have to improve network visibility, expand data collection and expand threat hunting capabilites if they want their XDR deployments to succeed. This issue of Tech Insights also includes: a market overview for XDR from Omdia, questions to ask before deploying XDR, and an XDR primer.
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2022-31099
PUBLISHED: 2022-06-27
rulex is a new, portable, regular expression language. When parsing untrusted rulex expressions, the stack may overflow, possibly enabling a Denial of Service attack. This happens when parsing an expression with several hundred levels of nesting, causing the process to abort immediately. This is a s...
CVE-2022-31101
PUBLISHED: 2022-06-27
prestashop/blockwishlist is a prestashop extension which adds a block containing the customer's wishlists. In affected versions an authenticated customer can perform SQL injection. This issue is fixed in version 2.1.1. Users are advised to upgrade. There are no known workarounds for this issue.
CVE-2022-31103
PUBLISHED: 2022-06-27
lettersanitizer is a DOM-based HTML email sanitizer for in-browser email rendering. All versions of lettersanitizer below 1.0.2 are affected by a denial of service issue when processing a CSS at-rule `@keyframes`. This package is depended on by [react-letter](https://github.com/mat-sz/react-letter),...
CVE-2022-32994
PUBLISHED: 2022-06-27
Halo CMS v1.5.3 was discovered to contain an arbitrary file upload vulnerability via the component /api/admin/attachments/upload.
CVE-2022-32995
PUBLISHED: 2022-06-27
Halo CMS v1.5.3 was discovered to contain a Server-Side Request Forgery (SSRF) via the template remote download function.