CVE-2016-1548
ntp: ntpd switching to interleaved mode with spoofed packets
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
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.
Un atacante puede suplantar un paquete de un servidor ntpd legítimo con una marca de tiempo de origen que coincida con la marca de tiempo peer->dst registrada para ese servidor. Después de hacer este cambio, el cliente en NTP 4.2.8p4 y versiones anteriores y NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c rechazarán todas las futuras respuestas legítimas del servidor. Es posible forzar al cliente víctima a mover el tiempo después de que el modo haya sido cambiado. ntpq no indica que el modo ha sido cambiado.
It was found that an ntpd client could be forced to change from basic client/server mode to the interleaved symmetric mode. A remote attacker could use a spoofed packet that, when processed by an ntpd client, would cause that client to reject all future legitimate server responses, effectively disabling time synchronization on that client.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2016-01-07 CVE Reserved
- 2016-05-02 CVE Published
- 2024-02-29 EPSS Updated
- 2024-08-05 CVE Updated
- 2024-08-05 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-19: Data Processing Errors
CAPEC
References (36)
| URL | Date | SRC |
|---|---|---|
| http://www.talosintelligence.com/reports/TALOS-2016-0082 | 2024-08-05 |
| URL | Date | SRC |
|---|