SB2021042026 - Ubuntu update for ntp

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Main Vulnerability Database SB2021042026

SB2021042026 - Ubuntu update for ntp

Published: April 20, 2021

Security Bulletin ID SB2021042026
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Information disclosure (CVE-ID: CVE-2018-7182)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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


The vulnerability allows a remote unautheticated attacker to obtain potentially sensitive information.

The weakness exists due to insufficient validation user-supplied input. A remote attacker can submit a specially crafted mode 6 packet and gain access to potentially sensitive information.


2) NULL pointer dereference (CVE-ID: CVE-2019-8936)

CWE-ID: CWE-476 - NULL Pointer Dereference

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


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when processing authenticated mode 6 packets. A remote attacker can send malicious authenticated mode 6 (ntpq) packet from a permitted network address, trigger a NULL pointer dereference error and crash ntpd.


Remediation

Install update from vendor's website.

References