---
title: "CVE-2014-9751\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2014-9751?format=md
keywords: index, follow
---

# CVE-2014-9751

Publication date 6 October 2015

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## 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.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2014-9751?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| ntp | 15.10 wily | Not affected |
| 15.04 vivid | Not affected |
| 14.04 LTS trusty | Not affected |
| 12.04 LTS precise | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2014-9751?format=md#patch-details)

## Notes

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

this used to be known as CVE-2014-9298, patches were released
in USN-2497-1

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| ntp | * Upstream:   [96c37aa](https://github.com/ntp-project/ntp/commit/96c37aa51d3033a4b552de3c31d0fc1cc66d1f9b) * Upstream:   [96e106d](https://github.com/ntp-project/ntp/commit/96e106df5925c7d4c51b73b2f03ac403e8e1beb2) * Upstream:   [9ebcc19](https://github.com/ntp-project/ntp/commit/9ebcc199749f89056cf0c5acb82bc5256395102c) * Upstream:   [2fb3929](https://github.com/ntp-project/ntp/commit/2fb392987ee930becfec6d8843ce96ba9b465dec) |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9751)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-9751)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-9751)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2014-9751)

### Other references

* <http://www.kb.cert.org/vuls/id/852879>
* <http://support.ntp.org/bin/view/Main/SecurityNotice#December_2014_NTP_Security_Vulne>
* <https://www.cve.org/CVERecord?id=CVE-2014-9751>