CVE-2016-1548

high

Description

An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimate server responses. It is possible to force the victim client to move time after the mode has been changed. ntpq gives no indication that the mode has been switched.

References

http://www.talosintelligence.com/reports/TALOS-2016-0082/

http://www.securityfocus.com/bid/88264

http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html

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

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

http://www.securitytracker.com/id/1035705

http://www.debian.org/security/2016/dsa-3629

https://security.netapp.com/advisory/ntap-20171004-0002/

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

https://access.redhat.com/errata/RHSA-2016:1141

http://rhn.redhat.com/errata/RHSA-2016-1552.html

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

http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html

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

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html

http://www.securityfocus.com/archive/1/538233/100/0/threaded

http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html

https://www.debian.org/security/2016/dsa-3629

https://www.kb.cert.org/vuls/id/718152

http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html

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

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html

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

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

http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html

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

https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0082

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd

http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded

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

Details

Source: MITRE

Published: 2017-01-06

Updated: 2021-11-17

Type: CWE-19

Risk Information

CVSS v2

Base Score: 6.4

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:P

Impact Score: 4.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.2

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

Impact Score: 2.7

Exploitability Score: 3.9

Severity: HIGH