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4.3
CVSSv2

CVE-2016-4955

Published: 05/07/2016 Updated: 07/11/2023
CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6
CVSS v3 Base Score: 5.9 | Impact Score: 3.6 | Exploitability Score: 2.2
VMScore: 383
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
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Vulnerability Summary

ntpd in NTP 4.x prior to 4.2.8p8, when autokey is enabled, allows remote malicious users 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.

Vulnerability Trend

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ntp ntp 4.2.8

ntp ntp

oracle solaris 11.3

oracle solaris 10

novell suse manager 2.1

suse linux enterprise server 11

suse openstack cloud 5

suse manager proxy 2.1

suse linux enterprise server 12

suse linux enterprise desktop 12

opensuse leap 42.1

opensuse opensuse 13.2

siemens simatic_net_cp_443-1_opc_ua_firmware

Vendor Advisories

Ubuntu Security Notice: ntp vulnerabilities
Several security issues were fixed in NTP ...
Amazon Linux AMI: ALAS-2016-727
It was discovered that ntpq and ntpdc disclosed the origin timestamp to unauthenticated clients, which could permit such clients to forge the server's replies (CVE-2015-8139) The process_packet function in ntp_protoc in ntpd in NTP 4x before 428p8 allows remote attackers to cause a denial of service (peer-variable modification) by sending spoo ...
Red Hat: CVE-2016-4955
ntpd in NTP 4x before 428p8, 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 ...

References

CWE-362http://www.kb.cert.org/vuls/id/321640http://support.ntp.org/bin/view/Main/NtpBug3043http://bugs.ntp.org/3043http://support.ntp.org/bin/view/Main/SecurityNoticehttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.htmlhttp://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlhttp://www.securityfocus.com/bid/91007https://security.gentoo.org/glsa/201607-15http://www.securitytracker.com/id/1036037https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.aschttps://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdfhttp://www.securityfocus.com/archive/1/archive/1/538600/100/0/threadedhttp://www.securityfocus.com/archive/1/archive/1/538599/100/0/threadedhttp://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.htmlhttp://www.ubuntu.com/usn/USN-3096-1http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.htmlhttp://www.securityfocus.com/archive/1/538599/100/0/threadedhttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpdhttp://www.securityfocus.com/archive/1/538600/100/0/threadedhttps://us-cert.cisa.gov/ics/advisories/icsa-21-159-11https://www.kb.cert.org/vuls/id/321640http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.htmlhttp://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/https://usn.ubuntu.com/3096-1/https://nvd.nist.govhttps://www.kb.cert.org/vuls/id/321640
CVSSv2
CVSSv2
CVSSv3
VMScore
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