CVE-2016-1548
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bullseye | fixed | 1:4.2.8p7+dfsg-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| ntp | ntp | 4.2.8 | |
References
- https://www.suse.com/security/cve/CVE-2016-1548.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html
- 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/2016-05/msg00052.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
- http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
- http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html
- http://rhn.redhat.com/errata/RHSA-2016-1552.html
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd
- http://www.debian.org/security/2016/dsa-3629
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.securityfocus.com/archive/1/538233/100/0/threaded
- http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded
- http://www.securityfocus.com/bid/88264
- http://www.securitytracker.com/id/1035705
- http://www.talosintelligence.com/reports/TALOS-2016-0082/
- http://www.ubuntu.com/usn/USN-3096-1
- https://access.redhat.com/errata/RHSA-2016:1141
- https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
CWEs
CWE-19
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.