Vulnerability identifier: #VU556

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Drupal
Web applications / CMS

Vendor: Drupal

Description
The vulnerability allows a remote user to perform arbitrary code execution on the target server.
The weakness is caused by Drupal installer. Use of visitors' credentials for database in case of lack of site's database inaccessibility leads to arbitary code execution.
Successful exploitation of the vulnerability may result in arbitrary code execution on the vulnerable system.

Mitigation
Update to 5.3.
http://ftp.drupal.org/files/projects/drupal-5.3.tar.gz

Vulnerable software versions

Drupal: 5.0 - 5.2

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External links
http://www.drupal.org/node/184316

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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.