Brute-force attack in Drupal Drupal

1) Brute-force attack

EUVDB-ID: #VU425

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-3163

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows remote users to perform brute-force attack on the target system.
The vulnerability exists due to XML-RPC system that allows attackers to repeat the same methods of security bypass suitable for brute-force attacks (e.g. determine the user's password by quessing all possible combinations).
Successful exploitation of this vulnerability may result in performing brute-force attack on the vulnerable system.

Mitigation

Update 6.x to 6.38.
https://www.drupal.org/drupal-6.38-release-notes
Update 7.x. to 7.43.
https://www.drupal.org/project/drupal/releases/7.43

Vulnerable software versions

Drupal: 6.0 - 7.42

CPE2.3

• cpe:2.3:a:drupal:drupal:6.0:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:6.1:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:6.2:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:6.14:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:6.15:*:*:*:*:*:*:*

External links

https://www.drupal.org/SA-CORE-2016-001

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.