CVE-2023-36664

What it actually does

The flaw causes memory corruption within the Drush process, enabling potential arbitrary code execution or denial of service through manipulated memory structures.

Why it matters to the business

Systems using the vulnerable Drush tool for site management face risk of disruption or unauthorized control, affecting operational workflows for affected Drupal environments.

How an attack unfolds

An attacker identifies a vulnerable Drush installation and supplies crafted input via command-line operations that triggers the memory corruption, allowing takeover of the process execution flow.

How to fix it

Upgrade drush (Bitnami) to version 9.2.16 or later to resolve the memory corruption issue.

How to confirm the fix worked

Confirm the running Drush version meets or exceeds 9.2.16 and validate through version checks or memory safety testing tools.

Typical attack path

1. Locate exposed or accessible Drush installations on target systems
2. Craft and deliver malicious input through Drush commands
3. Trigger memory corruption to alter program state
4. Escalate to code execution or service interruption

How to detect it

Review system and application logs for unexpected Drush process terminations or unusual command patterns that may indicate prior exploitation attempts.

What your security team should do

• Apply the fixed version 9.2.16 immediately across all instances
• Restrict Drush command access to trusted users only
• Monitor for anomalous process behavior or crashes