Incorrect Calculation Affecting ntp package, versions <1:4.2.8p4+dfsg-3ubuntu5.5
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-372929
- published13 Jan 2017
- disclosed13 Jan 2017
Introduced: 13 Jan 2017
CVE-2016-7433 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 ntp to version 1:4.2.8p4+dfsg-3ubuntu5.5 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.
NTP before 4.2.8p9 does not properly perform the initial sync calculations, which allows remote attackers to unspecified impact via unknown vectors, related to a "root distance that did not include the peer dispersion."
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-7433
- https://www.kb.cert.org/vuls/id/633847
- https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
- https://security-tracker.debian.org/tracker/CVE-2016-7433
- http://nwtime.org/ntp428p9_release/
- https://bto.bluecoat.com/security-advisory/sa139
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
- http://support.ntp.org/bin/view/Main/NtpBug3067
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://rhn.redhat.com/errata/RHSA-2017-0252.html
- http://www.securityfocus.com/bid/94455
- http://www.securitytracker.com/id/1037354
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ILMSYVQMMF37MANYEO7KBHOPSC74EKGN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PABKEYX6ABBFJZGMXKH57X756EJUDS3C/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U5E3XBBCK5IXOLDAH2E4M3QKIYIHUMMP/
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00153.html
- http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20171129-01-ntpd-en
- http://www.securityfocus.com/archive/1/539955/100/0/threaded
- http://www.securityfocus.com/archive/1/540254/100/0/threaded
- http://www.securityfocus.com/archive/1/archive/1/539955/100/0/threaded
- http://www.securityfocus.com/archive/1/archive/1/540254/100/0/threaded
- http://www.ubuntu.com/usn/USN-3349-1
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMSYVQMMF37MANYEO7KBHOPSC74EKGN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PABKEYX6ABBFJZGMXKH57X756EJUDS3C/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U5E3XBBCK5IXOLDAH2E4M3QKIYIHUMMP/
- https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
- https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227
- https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227/