Support Board <= 3.4.1 - Authenticated SQL Injection

2022-01-19 00:00
zhangxf

Strategic Overview

Status
Patched in 3.4.2
Affected Plugin
Support Board
Affected Version
< 3.4.2
CVSS
8.8High
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE pending
View all Support Board vulnerabilities

At a glance

This record tracks a high-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Support Board WordPress plugin, affecting versions < 3.4.2. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account. The issue is fixed in version 3.4.2; sites on affected versions should update now. Disclosed January 2022, reported by zhangxf.

Vulnerability Overview

The Support Board plugin for WordPress is vulnerable to generic SQL Injection via several parameters in versions up to, and including, 3.4.1 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers with a low privilege to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Reaching this weakness in Support Board < 3.4.2 takes any authenticated account. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For Support Board the fix is 3.4.2: builds < 3.4.2 are affected, anything from 3.4.2 onward is not.

Remediation

Update to version 3.4.2, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Support Board: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Support Board 3.4.2 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/0c06d868-ac71-401a-9b8e-ee04a099c095

Related records

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