Security Bulletin: IBM MQ Appliance is affected by multiple open source vulnerabilities

Summary

IBM MQ Appliance has resolved multiple open source vulnerabilities (CVE-2022-40303, CVE-2022-40304, CVE-2021-46848 and CVE-2022-43680).

Vulnerability Details

CVEID:CVE-2022-40303
**DESCRIPTION:**Gnome libxml2 could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow in the XML_PARSE_HUGE function. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 7.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/238602 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

CVEID:CVE-2022-40304
**DESCRIPTION:**Gnome ibxml2 could allow a remote attacker to execute arbitrary code on the system, caused by a dict corruption flaw. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 7.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/238603 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

CVEID:CVE-2021-46848
**DESCRIPTION:**GNU Libtasn1 could allow a remote attacker to obtain sensitive information, caused by an out-of-bound access flaw in ETYPE_OK. By sending a specially-crafted request, an attacker could exploit this vulnerability to obtain sensitive information, or cause a denial of service condition.
CVSS Base score: 9.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/240735 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H)

CVEID:CVE-2022-43680
**DESCRIPTION:**libexpat is vulnerable to a denial of service, caused by a use-after free created by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations. A remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/238951 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

This vulnerability is addressed under IT43377

IBM strongly recommends addressing the vulnerability now.

IBM MQ Appliance version 9.3 LTS

Apply IBM MQ Appliance 9.3.0.5 fix pack, or later firmware.

IBM MQ Appliance version 9.3 CD

Apply IBM MQ Appliance 9.3.2.1 cumulative security update, or later firmware.

Workarounds and Mitigations

None