Security Bulletin: IBM Cloud Pak for Multicloud Management Monitoring is vulnerable to various attacks due to its use of redis (CVE-2021-32675, CVE-2021-32626, CVE-2021-32672)

Summary

Redis is used by several components in IBM Cloud Pak for Multicloud Management Monitoring as an in-memory shared cache database. It is not exposed outside the cluster.

Vulnerability Details

CVEID:CVE-2021-32672
**DESCRIPTION:**Redis could allow a remote authenticated attacker to obtain sensitive information, caused by a flaw in the Lua Debugger. By sending specially-crafted requests, an attacker could exploit this vulnerability to read data beyond the actual buffer, and use this information to launch further attacks against the affected system.
CVSS Base score: 3.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/210726 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N)

CVEID:CVE-2021-32626
**DESCRIPTION:**Redis is vulnerable to a heap-based buffer overflow, caused by improper bounds checking. By executing specially-crafted Lua scripts, a remote authenticated attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/210723 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVEID:CVE-2021-32675
**DESCRIPTION:**Redis is vulnerable to a denial of service, caused by improper input validation. By sending specially-crafted Redis Standard Protocol (RESP) requests, a remote attacker could exploit this vulnerability to allocate significant amount of memory.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/210727 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

IBM strongly recommends addressing the vulnerability now by upgrading using the instructions found at <https://www.ibm.com/docs/en/cloud-paks/cp-management/2.3.x?topic=installation-upgrade.&gt;

Workarounds and Mitigations

None