CVE-2016-4955 · threatengine.sh

Home/CVE/ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-vari

CVE

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-vari

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.

MEDIUM · CVSS 5.9 EPSS 0.01749

Schedule remediation

Public exploit or PoC is available

Sigma rules0 YARA rules0

⬡

Weakness Classification

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

▤

Affected Products & Versions

12

ntp>= 4.2.0 and < 4.2.8
ntp>= 4.3.0 and < 4.3.93
ntpall versions
oracle solarisall versions
suse manager proxyall versions
suse openstack cloudall versions
novell suse managerall versions
opensuse leapall versions
Show all 12 affected productsopensuseall versions
suse linux enterprise desktopall versions
suse linux enterprise serverall versions
siemens simatic net cp 443-1 opc ua firmwareall versions

⚠

Public Exploits & PoCs

2

pocpacketstormsecurity.com · Slackware-Security-Advisory-ntp-Updates.htmlpacketstormsecurity.com

pocpacketstormsecurity.com · FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.htmlpacketstormsecurity.com

▣

Scoring & Timeline

5.9

MEDIUM · CVSS v3.1 · cve@mitre.org

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD05 Jul 2016 · 01:59 AM

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

⚑

Vendor Advisories

8

suse-csafopenSUSE-SU-2024:10181-1
siemens-csafSSA-211752
usnUSN-3096-1
suse-csafSUSE-SU-2016:1602-1
suse-csafSUSE-SU-2016:1584-1
Show all 8 vendor advisoriessuse-csafSUSE-SU-2016:1568-1
suse-csafSUSE-SU-2016:1563-1
cisa-csafcisa-csaf-csaf_files-OT-white-2021-icsa-21-159-11

🔗

References & Sources

29

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://bugs.ntp.org/3043Issue TrackingVendor Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.htmlMailing ListThird Party Advisory

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

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.htmlMailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.htmlMailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.htmlMailing ListThird Party Advisory

Show all 29 references

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.htmlMailing ListThird Party Advisory

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

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

http://support.ntp.org/bin/view/Main/NtpBug3043PatchVendor Advisory

http://support.ntp.org/bin/view/Main/SecurityNoticeRelease NotesVendor Advisory

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

http://www.kb.cert.org/vuls/id/321640Third Party AdvisoryUS Government Resource

http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlThird Party Advisory

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/91007Third Party AdvisoryVDB Entry

http://www.securitytracker.com/id/1036037Third Party AdvisoryVDB Entry

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

https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdfThird Party Advisory

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.ascThird Party Advisory

https://security.gentoo.org/glsa/201607-15Third Party Advisory

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

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

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