Security Bulletin: IBM Watson Assistant for IBM Cloud Pak for Data is vulnerable ISC BIND denial of service vulnerabilities.

Summary

Potential ISC BIND denial of service vulnerabilities [CVE-2023-50868, CVE-2023-5517] have been identified that could affect IBM Watson Assistant for IBM Cloud Pak for Data. The vulnerability have been addressed. Refer to details for additional information.

Vulnerability Details

CVEID:CVE-2023-50868
**DESCRIPTION:**ISC BIND is vulnerable to a denial of service, caused by an error when preparing an NSEC3 closest encloser proof. By flooding the target resolver with queries, a remote attacker could exploit this vulnerability to cause CPU exhaustion on a DNSSEC-validating resolver.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/282901 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:CVE-2023-5517
**DESCRIPTION:**ISC BIND is vulnerable to a denial of service, caused by a flaw in query-handling code. By querying RFC 1918 reverse zones, a remote attacker could exploit this vulnerability to trigger an assertion failure.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/282905 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Remediation/Fixes

For all affected versions, IBM strongly recommends addressing the vulnerability now by upgrading to the latest (v5.0.1 or later releases) release of IBM Watson Assistant for IBM Cloud Pak for Data which maintains backward compatibility with the versions listed above.

Follow instructions for Installing Watson Assistant in Link to Release (v5.0.1 release information)

https://www.ibm.com/docs/en/cloud-paks/cp-data/5.0.x

Workarounds and Mitigations

None