Security Bulletin: IBM MQ, IBM WebSphere MQ and IBM MQ Appliance Open Source zlib is vulnerable to a denial of service (CVE-2016-9840, CVE-2016-9841, CVE-2016-9842, CVE-2016-9843)

Summary

Open Source zlib is vulnerable to a denial of service. By persuading a user to open a specially crafted document, a remote attacker could exploit this vulnerability to cause a denial of service.

Vulnerability Details

CVEID: CVE-2016-9840**
DESCRIPTION:** zlib is vulnerable to a denial of service, caused by out-of-bounds pointer arithmetic in inftrees.c. By persuading a user to open a specially crafted document, a remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 3.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/120508 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-9841**
DESCRIPTION:** zlib is vulnerable to a denial of service, caused by out-of-bounds pointer arithmetic in inftrees.c. By persuading a user to open a specially crafted document, a remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 3.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/120509 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-9842**
DESCRIPTION:** zlib is vulnerable to a denial of service, caused by an undefined left shift of negative number. By persuading a user to open a specially crafted document, a remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 3.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/120510 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-9843**
DESCRIPTION:** zlib is vulnerable to a denial of service, caused by a big-endian out-of-bounds pointer. By persuading a user to open a specially crafted document, a remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 3.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/120511 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

Affected Products and Versions

IBM WebSphere MQ V7.1

IBM WebSphere MQ 7.1.0.0 - 7.1.0.8 maintenance levels

IBM WebSphere MQ V7.5

IBM WebSphere MQ 7.5.0.0 - 7.5.0.7 maintenance levels

IBM MQ V8

IBM MQ 8.0.0.0 - 8.0.0.6 maintenance levels

IBM MQ Appliance V8

IBM MQ Appliance 8.0.0.0 - 8.0.0.6 maintenance levels

IBM MQ V9 LTS

IBM MQ V9.0.0.0 only

IBM MQ V9 CD
IBM MQ V9.0.1 and V9.0.2
IBM MQ Appliance V9 CD
IBM MQ Appliance V9.0.1 and V9.0.2

Remediation/Fixes

IBM WebSphere MQ V7.1

Apply Fix Pack 7.1.0.9

IBM WebSphere MQ V7.5

Apply Fix Pack 7.5.0.8

IBM MQ V8

Apply Fix Pack 8.0.0.7

IBM MQ Appliance V8

Apply Fix Pack 8.0.0.7 for MQ Appliance

IBM MQ V9 LTS

Apply Fix Pack 9.0.0.1

IBM MQ V9 CD

Upgrade to IBM MQ V9.0.3

IBM MQ Appliance V9 CD
Upgrade to IBM MQ Appliance 9.0.3

Workarounds and Mitigations

All Versions

Disable Channel Compression