Vulnerability DatabaseCVE-2016-4954
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CVE-2016-4954
July 05, 2016
The process_packet function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (peer-variable modification) by sending spoofed packets from many source IP addresses in a certain scenario, as demonstrated by triggering an incorrect leap indication.
Related Resources (38)
https://www.kb.cert.org/vuls/id/321640
https://people.canonical.com/~ubuntu-security/cve/CVE-2016-4954
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded
https://security.gentoo.org/glsa/201607-15
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.ubuntu.com/usn/USN-3096-1
http://bugs.ntp.org/3044
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/
http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
http://support.ntp.org/bin/view/Main/SecurityNotice
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
http://www.securityfocus.com/archive/1/538600/100/0/threaded
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd
http://www.securitytracker.com/id/1036037
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03757en_us
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
http://www.securityfocus.com/archive/1/538599/100/0/threaded
http://support.ntp.org/bin/view/Main/NtpBug3044
http://www.securityfocus.com/archive/1/540683/100/0/threaded
http://www.securityfocus.com/archive/1/archive/1/540683/100/0/threaded
https://access.redhat.com/security/cve/CVE-2016-4954
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html
http://www.kb.cert.org/vuls/id/321640
https://security-tracker.debian.org/tracker/CVE-2016-4954
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
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:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
CVSS v2
Base Score:
5
Access Vector
NETWORK
Access Complexity
LOW
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:
2.86