Home > Vulnerability Database > CVE-2016-4955

Mend.io Vulnerability Database

CVE-2016-4955

Date: July 4, 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.

Severity Score

5.9

Related Resources (36)

Url: http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html

Url: http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html

Url: http://support.ntp.org/bin/view/Main/NtpBug3043

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/

Url: http://www.securityfocus.com/archive/1/538600/100/0/threaded

Url: http://www.kb.cert.org/vuls/id/321640

Url: https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf

Url: http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html

Url: http://www.securityfocus.com/archive/1/538599/100/0/threaded

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/

Url: https://www.kb.cert.org/vuls/id/321640

Url: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd

Url: https://access.redhat.com/security/cve/CVE-2016-4955

Url: http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded

Url: http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html

Url: http://bugs.ntp.org/3043

Url: http://www.securityfocus.com/bid/91007

Url: http://www.securitytracker.com/id/1036037

Url: http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html

Url: https://nvd.nist.gov/vuln/detail/CVE-2016-4955

Url: http://support.ntp.org/bin/view/Main/SecurityNotice

Url: http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html

Url: http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded

Url: https://security-tracker.debian.org/tracker/CVE-2016-4955

Url: https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/

Url: https://security.gentoo.org/glsa/201607-15

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2016-4955

Url: https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11

Url: http://www.ubuntu.com/usn/USN-3096-1

Url: http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html

Url: http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html

Url: http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html

Url: http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html

Url: http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html

Url: https://www.mend.io/vulnerability-database/CVE-2016-4955

Severity Score

5.9

Weakness Type (CWE)

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CWE-362

CVSS v3.1

Base Score:	5.9
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	HIGH
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	4.3
Access Vector (AV):	NETWORK
Access Complexity (AC):	MEDIUM
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

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CVE-2016-4955

Date: July 4, 2016

Severity Score

Related Resources (36)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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