SB2020040143 - Red Hat Enterprise Linux 7 Extras update for docker

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Main Vulnerability Database SB2020040143

SB2020040143 - Red Hat Enterprise Linux 7 Extras update for docker

Published: April 1, 2020

Security Bulletin ID SB2020040143
Severity
High
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 33% Medium 33% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-16884)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect checking of the mount targets in libcontainer/rootfs_linux.go in runc. A local user can bypass AppArmor restrictions and perform unauthorized actions on the system, as demonstrated by overwriting the /proc directory with a malicious Doker image.


2) Use-after-free (CVE-ID: CVE-2020-8945)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error, as demonstrated by use for container image pulls by Docker or CRI-O. A remote attacker can crash the target system, or cause potential code execution for Go applications that use this library under certain conditions during GPG signature verification.


3) Resource exhaustion (CVE-ID: CVE-2020-1702)

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

The vulnerability exists due to application reads the entire image manifest file into memory. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack by supplying a huge manifest file.


Remediation

Install update from vendor's website.

References