SB2020110505 - Red Hat Enterprise Linux 8 update for the container-tools:rhel8 module

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Main Vulnerability Database SB2020110505

SB2020110505 - Red Hat Enterprise Linux 8 update for the container-tools:rhel8 module

Published: November 5, 2020

Security Bulletin ID SB2020110505
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 67% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Insufficient verification of data authenticity (CVE-ID: CVE-2020-10749)

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

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


The vulnerability allows a remote attacker to perform a man-in-the-Middle attack.

The vulnerability exists due to insufficient verification of data authenticity in CNI plugins when processing IPV6 router advertisements. A malicious container can exploit this flaw by sending rogue IPv6 router advertisements to the host or other containers, to redirect traffic to the malicious container.


2) Out-of-bounds read (CVE-ID: CVE-2020-10756)

CWE-ID: CWE-125 - Out-of-bounds read

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


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in the "icmp6_send_echoreply()" routine while replying to an ICMP echo request. A remote attacker with access to guest operating system can trigger out-of-bounds read error and read contents of memory on the system.


3) Infinite loop (CVE-ID: CVE-2020-14040)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

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


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

The x/text package before 0.3.3 for Go has a vulnerability in encoding/unicode that could lead to the UTF-16 decoder entering an infinite loop, causing the program to crash or run out of memory. An attacker could provide a single byte to a UTF16 decoder instantiated with UseBOM or ExpectBOM to trigger an infinite loop if the String function on the Decoder is called, or the Decoder is passed to golang.org/x/text/transform.String.


Remediation

Install update from vendor's website.

References