Security Bulletin: IBM MaaS360 Cloud Extender Agent, Configuration Utility, Certificate, and Base Module affected by multiple vulnerabilities (CVE-2023-28322, CVE-2023-28320, CVE-2023-28319, CVE-2023-28321)

Summary

Vulnerabilities contained within libcurl (a 3rd party component) were addressed in the IBM MaaS360 Cloud Extender Agent, Configuration Utility, Certificate, and Base Modules.

Vulnerability Details

CVEID:CVE-2023-28322
**DESCRIPTION:**cURL libcurl could allow a remote attacker to bypass security restrictions, caused by a flaw in the logic for a reused handle when it is (expected to be) changed from a PUT to a POST… By sending a specially crafted request, an attacker could exploit this vulnerability to cause application to misbehave and either send off the wrong data or use memory after free or similar in the second transfer.
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/255626 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)

CVEID:CVE-2023-28320
**DESCRIPTION:**cURL libcurl is vulnerable to a denial of service, caused by a race condition flaw in the siglongjmp() function. By sending a specially crafted request, a remote attacker could exploit this vulnerability to cause the application to crash or misbehave.
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/255624 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID:CVE-2023-28319
**DESCRIPTION:**cURL libcurl could allow a remote attacker to obtain sensitive information, caused by a use-after-free flaw in SSH sha256 fingerprint check. By sending a specially crafted request, an attacker could exploit this vulnerability to obtain sensitive heap-based data from the error message, and use this information to launch further attacks against the affected system.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/255616 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID:CVE-2023-28321
**DESCRIPTION:**cURL libcurl could allow a remote attacker to bypass security restrictions, caused by a flaw when listed as “Subject Alternative Name” in TLS server certificates. By sending a specially crafted request, an attacker could exploit this vulnerability to accept mismatch wildcard patterns.
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/255625 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

Remediation/Fixes

IBM strongly recommends customers update their systems promptly.

1. Update the IBM MaaS360 Cloud Extender to version 3.000.250.023 or greater.
2. Apply the IBM MaaS360 Base, Configuration Utility, PKI Certificates, VPN Modules to version 3.000.250 or greater.

• The latest Cloud Extender Agent is available within the MaaS360 Administrator Portal.
• Instructions to upgrade the Agent and modules are located on this IBM Documentation page.

Workarounds and Mitigations

None