Vulnerability DatabaseCVE-2016-4955
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CVE-2016-4955
July 05, 2016
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
Related Resources (34)
http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded
http://www.securityfocus.com/archive/1/538599/100/0/threaded
https://www.kb.cert.org/vuls/id/321640
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
http://support.ntp.org/bin/view/Main/SecurityNotice
http://www.ubuntu.com/usn/USN-3096-1
http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded
http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html
http://www.securityfocus.com/archive/1/538600/100/0/threaded
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
https://security.gentoo.org/glsa/201607-15
https://access.redhat.com/security/cve/CVE-2016-4955
https://people.canonical.com/~ubuntu-security/cve/CVE-2016-4955
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
http://support.ntp.org/bin/view/Main/NtpBug3043
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html
http://bugs.ntp.org/3043
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
http://www.securityfocus.com/bid/91007
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.securitytracker.com/id/1036037
https://security-tracker.debian.org/tracker/CVE-2016-4955
http://www.kb.cert.org/vuls/id/321640
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
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CVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
CVSS v2
Base Score:
4.3
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Weakness Type (CWE)
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362
EPSS
Base Score:
8.08