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Bug 1435561 - (CVE-2017-6455) CVE-2017-6455 ntp: Privileged execution of User Library code
CVE-2017-6455 ntp: Privileged execution of User Library code
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20170321,reported=2...
: Security
Depends On:
Blocks:
  Show dependency tree / graph
 
Reported: 2017-03-24 04:59 EDT by Andrej Nemec
Modified: 2017-03-24 05:05 EDT (History)
2 users (show)

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Last Closed: 2017-03-24 05:05:41 EDT
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Description Andrej Nemec 2017-03-24 04:59:25 EDT 
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 05:04:44 EDT 
Acknowledgments:

Name: the NTP project
Upstream: Cure53
Comment 2 Andrej Nemec 2017-03-24 05:05:41 EDT 
Statement:

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