Security Bulletin: IBM MQ Advanced Message Security is vulnerable to an OpenSSL error while parsing an ASN.1 data. (CVE-2018-0739)

Summary

IBM MQ have addressed a vulnerability whereby OpenSSL could allow a remote attacker to execute a denial of service attack by sending specially crafted ASN.1 data.

OpenSSL is used by IBM MQ Advanced Message Security on the IBM i platform only.

Vulnerability Details

CVEID: CVE-2018-0739**
DESCRIPTION:** OpenSSL is vulnerable to a denial of service. By sending specially crafted ASN.1 data with a recursive definition, a remote attacker could exploit this vulnerability to consume excessive stack memory.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/140847 for the current score
CVSS Environmental Score*: Undefined
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

IBM MQ v8.0

• Maintenance levels 8.0.0.0 - 8.0.0.9

IBM MQ v9 LTS

• Maintenance levels 9.0.0.0 - 9.0.0.3

Remediation/Fixes

IBM MQ v8.0

• Apply Fixpack 8.0.0.10

IBM MQ v9 LTS

• Apply Fixpack 9.0.0.4