Vulnerability Report

CVE-2016-4955

Title: Suse Openstack Cloud Path Traversal / LFI

Arbitrary File Access

Proof Of Concept

No public PoC currently indexed for CVE-2016-4955.

CWE Category CWE-362

Published Date Jul 05, 2016

Modified Date May 06, 2026

Exploit Status Not Found

Score 5.9 CVSS v3.1

Exploit Probability (EPSS)

1.75%

Vulnerability Summary

CVE-2016-4955: 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.

Impacted Vendors

Reference Links

http://bugs.ntp.org/3043 http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.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/2016-08/msg00042.html http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html http://support.ntp.org/bin/view/Main/NtpBug3043 http://support.ntp.org/bin/view/Main/SecurityNotice http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd http://www.kb.cert.org/vuls/id/321640 http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html http://www.securityfocus.com/archive/1/538599/100/0/threaded http://www.securityfocus.com/archive/1/538600/100/0/threaded http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded http://www.securityfocus.com/bid/91007 http://www.securitytracker.com/id/1036037 http://www.ubuntu.com/usn/USN-3096-1 https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/ 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/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/ https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc https://security.gentoo.org/glsa/201607-15 https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11 https://www.kb.cert.org/vuls/id/321640 http://bugs.ntp.org/3043 http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.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/2016-08/msg00042.html http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html http://support.ntp.org/bin/view/Main/NtpBug3043 http://support.ntp.org/bin/view/Main/SecurityNotice http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd http://www.kb.cert.org/vuls/id/321640 http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html http://www.securityfocus.com/archive/1/538599/100/0/threaded http://www.securityfocus.com/archive/1/538600/100/0/threaded http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded http://www.securityfocus.com/bid/91007 http://www.securitytracker.com/id/1036037 http://www.ubuntu.com/usn/USN-3096-1 https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/ 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/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/ https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc https://security.gentoo.org/glsa/201607-15 https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11 https://www.kb.cert.org/vuls/id/321640

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

5.9

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

4.3

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:M/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-4955 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

May 06, 2026 MODIFIED

Vulnerability data updated via NVD.

April 12, 2025 MODIFIED

Vulnerability data or affected products updated.

July 05, 2016 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity HIGH

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.