Bug 1435561 (CVE-2017-6455)

Summary:	CVE-2017-6455 ntp: Privileged execution of User Library code
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	linville, mlichvar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Last Closed:	2017-03-24 09:05:41 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description Andrej Nemec 2017-03-24 08:59:25 UTC

The Windows NT port has the added capability to preload DLLs defined in the inherited global local environment variable PPSAPI_DLLS. The code contained within those libraries is then called from the NTPD service, usually running with elevated privileges. Depending on how securely the machine is setup and configured, if ntpd is configured to use the PPSAPI under Windows this can easily lead to a code injection.

Upstream bug:

http://support.ntp.org/bin/view/Main/NtpBug3384

References:

http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu

Comment 1 Andrej Nemec 2017-03-24 09:04:44 UTC

Acknowledgments:

Name: the NTP project
Upstream: Cure53

Comment 2 Andrej Nemec 2017-03-24 09:05:41 UTC

Statement:

This issue did not affect the versions of ntp as shipped with Red Hat Enterprise Linux.