SB2020042822 - Denial of service in ntpd
Published: April 28, 2020
Security Bulletin ID
SB2020042822
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Authentication Bypass by Spoofing (CVE-ID: CVE-2020-11868)
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.
Remediation
Install update from vendor's website.