Access Restriction Bypass Affecting ntp package, versions <1:4.2.8p4+dfsg-3ubuntu5.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1604-NTP-373053
- published14 Apr 2017
- disclosed14 Apr 2017
Introduced: 14 Apr 2017
CVE-2016-0727 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 ntp to version 1:4.2.8p4+dfsg-3ubuntu5.3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ntp package and not the ntp package as distributed by Ubuntu.
See How to fix? for Ubuntu:16.04 relevant fixed versions and status.
The crontab script in the ntp package before 1:4.2.6.p3+dfsg-1ubuntu3.11 on Ubuntu 12.04 LTS, before 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10 on Ubuntu 14.04 LTS, on Ubuntu Wily, and before 1:4.2.8p4+dfsg-3ubuntu5.3 on Ubuntu 16.04 LTS allows local users with access to the ntp account to write to arbitrary files and consequently gain privileges via vectors involving statistics directory cleanup.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-0727
- https://security-tracker.debian.org/tracker/CVE-2016-0727
- http://packetstormsecurity.com/files/141913/NTP-Privilege-Escalation.html
- https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/1528050
- https://bugzilla.redhat.com/show_bug.cgi?id=1382369
- http://www.securityfocus.com/bid/81552
- http://www.securitytracker.com/id/1034808
- http://www.ubuntu.com/usn/USN-3096-1