CVE-2016-1550

MEDIUM

libntp <4.2.8p4 - Info Disclosure

Title source: llm

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.

References (34)

[Vendor Advisory] http://rhn.redhat.com/errata/RHSA-2016-1552.html

[Mailing List] http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html

[Exploit, Third Party Advisory] http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html

[Various Sources] http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd

[Vendor Advisory] http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html

[Vendor Advisory] http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id/1035705

[Technical Description, Third Party Advisory] http://www.talosintelligence.com/reports/TALOS-2016-0084/

[Vendor Advisory] http://www.ubuntu.com/usn/USN-3096-1

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2016:1141

[Vendor Advisory] https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf

[Vendor Advisory] https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf

[Various Sources] https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc

[Third Party Advisory, US Government Resource] https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11

[Third Party Advisory, US Government Resource] https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11

[Various Sources] https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19

[Third Party Advisory, US Government Resource] https://www.kb.cert.org/vuls/id/718152

[Third Party Advisory] https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0084

[Vendor Advisory] https://security.netapp.com/advisory/ntap-20171004-0002/

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/archive/1/538233/100/0/threaded

... and 14 more

Scores

CVSS v3 5.3

EPSS 0.0313

EPSS Percentile 86.7%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Classification

CWE

CWE-200

Status published

Affected Products (4)

ntp/ntp

NTP Project/NTP < 4.2.8p3

NTP Project/NTP < 4.2.8p4

NTPsec Project/NTPSec < a5fb34b9cc89b92a8fef2f459004865c93bb7f92

Timeline

Published Jan 06, 2017

Tracked Since Feb 18, 2026