SB2019022101 - Remote PHP code execution in Drupal

Description

This security bulletin contains information about 1 vulnerability.

1) Code Injection (CVE-ID: CVE-2019-6340)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber

The vulnerability allows a remote attacker to execute arbitrary PHP code on the target system.

The vulnerability exists due to improper input validation when processing field types in requests, related to API functionality. A remote attacker can send a specially crafted request and execute arbitrary PHP code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires that:

• - RESTful Web Services (rest) module is enabled and accepts PATCH or POST requests

OR


• - the site has another web services module enabled, like JSON:API in Drupal 8, or Services or RESTful Web Services in Drupal 7.

Note: we are aware of reports regarding in the wild exploitation of this vulnerability days after the official patch.

Remediation

Install update from vendor's website.

References

• https://www.drupal.org/
• https://www.drupal.org/sa-core-2019-003