High severity · published Jan 6, 2017
CVE-2016-1548
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
7.2
CVSS
3.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)3.8% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NT
Ntp · Ntp
4.2.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-1548
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-1548
lists.fedoraproject.org
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html
lists.fedoraproject.org
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html
More from Ntp
9.8
CVE-2018-12327
Stack-based buffer overflow in ntpq and ntpdc of NTP version 4.2.8p11 allows an attacker to achieve code execution or escalate to higher privileges via a long string as the…
9.8
CVE-2018-7183
Buffer overflow in the decodearr function in ntpq in ntp 4.2.8p6 through 4.2.8p10 allows remote attackers to execute arbitrary code by leveraging an ntpq query and sending a…
9.8
CVE-2015-7871
Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication
9.8
CVE-2015-7853
The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service…
9.8
CVE-2015-7705
The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests