Security Bulletin: Multiple vulnerabilities in F5 NGINX Controller affect IBM Cloud Pak for Automation

Summary

The vulnerabilities are related to F5 NGINX Controller, included in the pfs-nginx-prod docker image, that is deployed by IBM Process Federation Server .

Vulnerability Details

CVEID:CVE-2021-23018
**DESCRIPTION:**F5 NGINX Controller could allow a remote attacker to obtain sensitive information, caused by not using TLS in the intra-cluster communication. By using man-in-the-middle attack techniques, an attacker could exploit this vulnerability to obtain sensitive information, and modify the data being sent between services managed.
CVSS Base score: 7.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/202427 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVEID:CVE-2021-23017
DESCRIPTION: NGINX could allow a remote attacker to execute arbitrary code on the system, caused by an off-by-one error in ngx_resolver_copy() while processing DNS responses. By sending a specially-crafted request, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 8.1
CVSS Temporal Score: See: <https://exchange.xforce.ibmcloud.com/vulnerabilities/202450&gt; for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID:CVE-2021-23021
**DESCRIPTION:**F5 NGINX Controller could allow a local authenticated attacker to obtain sensitive information, caused by a weak file permission flaw in the agent configuration file /etc/controller-agent/agent.conf. By gaining access to the agent.conf file, an attacker could exploit this vulnerability to obtain sensitive information, and use this information to launch further attacks against the affected system.
CVSS Base score: 3.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/202430 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)

CVEID:CVE-2021-23020
**DESCRIPTION:**F5 NGINX Controller could allow a local attacker to obtain sensitive information, caused by the use of an insecure pseudo-random string and hashing algorithm to generate NAAS API keys. By using cryptographic attack techniques, an attacker could exploit this vulnerability to obtain NAAS API keys information, and use this information to launch further attacks against the affected system.
CVSS Base score: 5.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/202429 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N)

CVEID:CVE-2021-23019
**DESCRIPTION:**F5 NGINX Controller could allow a local authenticated attacker to obtain sensitive information, caused by the storage of Administrator credentials in the systemd.txt file. By gaining access to the systemd.txt file, an attacker could exploit this vulnerability to obtain Administrator credentials, and use this information to launch further attacks against the affected system.
CVSS Base score: 7.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/202428 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

Remediation/Fixes

Upgrade to IBM Cloud Pak for Automation 21.0.2 IF001

Workarounds and Mitigations

None