Privilege escalation in ISC BIND installer for Windows

1) Unquoted search path

EUVDB-ID: #VU7092

Risk: Low

CVSSv3.1: 6.7 [CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-3141

CWE-ID: CWE-428 - Unquoted Search Path or Element

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to unquotes search path in BIND installer for Windows during installation process. An attacker with ability to place specially crafted library into the folder, from which the BIND installer is executed, can obtain elevated privileges on the system.

Only Windows systems are affected by this issue.

Mitigation

Use the latest installer for  versions 9.9.10-P1, 9.10.5-P1 or 9.11.1-P1.

Vulnerable software versions

ISC BIND: 9.2.6-P2 - 9.11.1b1

External links

http://kb.isc.org/article/AA-01496/74/CVE-2017-3141%3A-Windows-service-and-uninstall-paths-are-not-...

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.