Input validation error in ntp - CVE-2018-8956
Published: July 7, 2020
Vulnerability identifier: #VU29542
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-8956
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
ntp
ntp
Software vendor:
ntp.org
ntp.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing NTP packets. A remote attacker that controls a slave server or is part of the same broadcast can prevent a broadcast client from synchronizing its clock with a broadcast NTP server via spoofed mode 3 and mode 5 packets.
Remediation
Install updates from vendor's website.