Security Bulletin: Multiple vulnerabilities in IBM Semeru Runtime affect z/Transaction Processing Facility

Summary

There are multiple vulnerabilities in IBM® Semeru Runtime Certified Edition 11 that is used by the z/TPF system. z/TPF has addressed the applicable CVEs.

Vulnerability Details

CVEID:CVE-2023-21967
**DESCRIPTION:**An unspecified vulnerability in Oracle Java SE, Oracle GraalVM Enterprise Edition related to the Hotspot component could allow a remote attacker to cause high confidentiality impact.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/253166 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-2023-21937
**DESCRIPTION:**An unspecified vulnerability in Oracle Java SE, Oracle GraalVM Enterprise Edition related to the Networking component could allow a remote attacker to cause integrity impact.
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/253167 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-2023-25193
**DESCRIPTION:**Harfbuzz is vulnerable to a denial of service, caused by an error in hb-ot-layout-gsubgpos.hh. By using consecutive marks during the process of looking back for base glyphs when attaching marks, a remote attacker could exploit this vulnerability to trigger O(n^2) growth and cause a denial of service.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/246411 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-2023-21835
**DESCRIPTION:**An unspecified vulnerability in Java SE related to the JSSE component could allow a remote authenticated attacker to cause a denial of service resulting in a high availability impact using unknown attack vectors.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/245039 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

Remediation/Fixes

1. Apply the APAR, which is available for download from the TPF Family Products: Maintenance web page.
2. Download and install the PJ47074_ibm-semeru-certified-jre-11.0.19.0 package from the z/TPF support for IBM Semeru Runtimes and IBM Java SDK download page.

**Note:**For the z/TPF real-time insights dashboard starter kit, rebuild the containers that use Java to update to the latest version of the IBM Semeru Runtimes.

Workarounds and Mitigations

None.