Home/CVE/An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer-dst timestam
CVE

CVE-2016-1548

An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer-dst timestam

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.

HIGH · CVSS 7.2 EPSS 0.05403
Act now
  • EPSS percentile: top 10% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0

Affected Products & Versions

1
ntpall versions

Public Exploits & PoCs

2

Scoring & Timeline

7.2
HIGH · CVSS v3.0 · cret@cert.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 NVD06 Jan 2017 · 09:59 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L

Vendor Advisories

15
suse-csafopenSUSE-SU-2024:10181-1
siemens-csafSSA-211752
siemens-csafSSA-497656
suse-csafSUSE-SU-2016:1602-1
🔗

References & Sources

31
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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