Vulnerability identifier: #VU7092

Vulnerability 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

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
ISC BIND
Server applications / DNS servers

Vendor: ISC

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

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

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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.

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.