Vulnerability identifier: #VU27395
Vulnerability risk: Low
CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-290
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
ntp
Server applications /
Other server solutions
Vendor: ntp.org
Description
The vulnerability allows a remote attacker to bypass authentication and perform a denial of service (DoS) attack.
The vulnerability exists due to ntpd allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp.A remote attacker can bypass authentication and block synchronization.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
ntp: 4.2.0 - 4.3.99
External links
http://support.ntp.org/bin/view/Main/NtpBug3592
http://bugzilla.redhat.com/show_bug.cgi?id=1716665
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.