Vulnerability identifier: #VU39359

Vulnerability risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-6455

CWE-ID: CWE-94

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
ntp
Server applications / Other server solutions

Vendor: ntp.org

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

NTP before 4.2.8p10 and 4.3.x before 4.3.94, when using PPSAPI, allows local users to gain privileges via a DLL in the PPSAPI_DLLS environment variable.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ntp: 4.2.8 - 4.3.93

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External links
http://support.ntp.org/bin/view/Main/NtpBug3384
http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu
http://www.securityfocus.com/bid/97074
http://www.securitytracker.com/id/1038123
http://www.securitytracker.com/id/1039427
http://support.apple.com/HT208144

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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.