Vulnerability identifier: #VU424

Vulnerability risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-3162

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Drupal
Web applications / CMS

Vendor: Drupal

Description
The weakness allows attackers to cause denial of service on the target system.
The vulnerability is caused by attacker's influence on files uploaded by a valid user. A malicious user can read and change the links to the uploaded files locating in unsubmitted forms. Continuous attacks can lead to complete blockage of the uploaded files and deleting of temporary files.
Successful exploitation of this vulnerability results in denial of service on the vulnerable system.

Mitigation
Update 7.x to 7.43.
https://www.drupal.org/project/drupal/releases/7.43
Update 8.0.x to 8.0.4
https://www.drupal.org/project/drupal/releases/8.0.4

Vulnerable software versions

Drupal: 7.0 - 7.42, 8.0.0 - 8.0.3

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External links
http://www.drupal.org/SA-CORE-2016-001

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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.