SB2020060252 - Authentication bypass in NTP component in F5 BIG-IP

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Main Vulnerability Database SB2020060252

SB2020060252 - Authentication bypass in NTP component in F5 BIG-IP

Published: June 2, 2020 Updated: December 25, 2020

Security Bulletin ID SB2020060252
CSH Severity
Low
Patch available
NO
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Authentication Bypass by Spoofing (CVE-ID: CVE-2020-11868)

CWE-ID: CWE-290 - Authentication Bypass by Spoofing

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


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

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References