CVE-2016-1551

Severity Score

3.7

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.

ntpd en NTP 4.2.8p3 y NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 confía en el sistema operativo subyacente para protegerlo de las solicitudes que suplantan relojes de referencia. Debido a que los relojes de referencia son tratados como otros pares y almacenados en la misma estructura, cualquier paquete con una dirección IP de origen de un reloj de referencia (127.127.1.1 por ejemplo) que alcance la función receive() coincidirá con el registro de par de referencia clock's y será tratado como un par de confianza. Cualquier sistema que carezca del típico filtrado de paquetes marcianos que bloquearía estos paquetes está en peligro de tener su tiempo controlado por un atacante.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-01-07 CVE Reserved
2016-05-02 CVE Published
2023-03-07 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-254: 7PK - Security Features

CAPEC

References (7)

URL	Tag	Source
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html	Third Party Advisory
http://www.securityfocus.com/bid/88219	Third Party Advisory
http://www.securitytracker.com/id/1035705	Vdb Entry
http://www.talosintelligence.com/reports/TALOS-2016-0132	Third Party Advisory
https://security.netapp.com/advisory/ntap-20171004-0002	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc	2017-11-21
https://security.gentoo.org/glsa/201607-15	2017-11-21

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p3		Affected
Ntpsec Search vendor "Ntpsec"		Ntpsec Search vendor "Ntpsec" for product "Ntpsec"				a5fb34b9cc89b92a8fef2f459004865c93bb7f92 Search vendor "Ntpsec" for product "Ntpsec" and version "a5fb34b9cc89b92a8fef2f459004865c93bb7f92"		-		Affected