CVE-2016-1550

Description

An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted messages to attempt to recover the message digest key.

Category

5.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.02% Top 25%
Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory cisco.com Vendor Advisory FreeBSD.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org
Affected: NTP Project NTP
Affected: NTPsec Project NTPSec
Published at:
Updated at:

References

Link Tags
http://www.ubuntu.com/usn/USN-3096-1 vendor advisory
http://www.debian.org/security/2016/dsa-3629 vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
https://access.redhat.com/errata/RHSA-2016:1141 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html vendor advisory
https://www.kb.cert.org/vuls/id/718152 third party advisory
http://rhn.redhat.com/errata/RHSA-2016-1552.html vendor advisory
http://www.securitytracker.com/id/1035705 vdb entry
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
https://security.netapp.com/advisory/ntap-20171004-0002/
http://www.talosintelligence.com/reports/TALOS-2016-0084/ third party advisory technical description
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd vendor advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc vendor advisory
http://www.securityfocus.com/bid/88261 vdb entry
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html vendor advisory
http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html vendor advisory
https://security.gentoo.org/glsa/201607-15 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html vendor advisory
http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html vendor advisory
https://www.debian.org/security/2016/dsa-3629 vendor advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0084
http://www.securityfocus.com/archive/1/538233/100/0/threaded mailing list
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html vendor advisory
http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded mailing list
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html vendor advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19

Frequently Asked Questions

What is the severity of CVE-2016-1550?
CVE-2016-1550 has been scored as a medium severity vulnerability.
How to fix CVE-2016-1550?
To fix CVE-2016-1550, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-1550 being actively exploited in the wild?
It is possible that CVE-2016-1550 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2016-1550?
CVE-2016-1550 affects NTP Project NTP, NTPsec Project NTPSec.
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