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CVE-2014-9751

6.8 · MEDIUM

The read_network_packet function in ntp_io.c in ntpd in NTP 4.x before 4.2.8p1 on Linux and OS X does not properly determine whether a source IP address is an IPv6 loopback address, which makes it…

Published Oct 6, 2015ntpCWE-20EPSS 4.53%

Overview

CVE-2014-9751 is a medium-severity vulnerability affecting ntp ntp. It was published on October 6, 2015 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The read_network_packet function in ntp_io.c in ntpd in NTP 4.x before 4.2.8p1 on Linux and OS X does not properly determine whether a source IP address is an IPv6 loopback address, which makes it easier for remote attackers to spoof restricted packets, and read or write to the runtime state, by leveraging the ability to reach the ntpd machine's network interface with a packet from the ::1 address.

Remediation

Check the references section for vendor advisories and patches from ntp. Update ntp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
ntpntp>= 4.2.0, < 4.2.8Affected

References

Refbugs.ntp.org/show_bug.cgi?id=2672Refrhn.redhat.com/errata/RHSA-2015-1459.htmlRefsupport.ntp.org/bin/view/Main/SecurityNotice#December_2014_NTP_Security_VulneRefwww.debian.org/security/2015/dsa-3388Refwww.kb.cert.org/vuls/id/852879Refwww.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.htmlRefwww.securityfocus.com/bid/72584Refbugzilla.redhat.com/show_bug.cgi?id=1184572Refsupport.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03886en_usRefbugs.ntp.org/show_bug.cgi?id=2672

How CyberStrike helps

Frequently asked questions

What is CVE-2014-9751?

CVE-2014-9751 is a medium-severity vulnerability affecting ntp ntp. It was published on October 6, 2015 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

How severe is CVE-2014-9751?

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2014-9751?

Check the references section for vendor advisories and patches from ntp. Update ntp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2014-9751?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2014-9751 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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