Security Bulletin: Vulnerabilities in OpenSSL affect IBM InfoSphere Information Server

Summary

OpenSSL vulnerabilities were disclosed on January 26, 2017 by the OpenSSL Project. OpenSSL is used by IBM InfoSphere Information Server. IBM InfoSphere Information Server has addressed the applicable CVEs.

Vulnerability Details

CVEID: CVE-2017-3731 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by an out-of-bounds read when using a specific cipher. By sending specially crafted truncated packets, a remote attacker could exploit this vulnerability using CHACHA20/POLY1305 to cause the application to crash.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/121312 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)

CVEID: CVE-2017-3732 DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive information, caused by a propagation error in the BN_mod_exp() function. An attacker could exploit this vulnerability to obtain information about the private key.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/121313 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2016-7055 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by an error in a Broadwell-specific Montgomery multiplication procedure. By sending specially crafted data, a remote attacker could exploit this vulnerability to trigger errors in public-key operations in configurations where multiple remote clients select an affected EC algorithm and cause a denial of service.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/118748 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

The following products, running on all supported platforms, are affected:
IBM InfoSphere Information Server: versions 9.1, 11.3, 11.5 and 11.7
IBM InfoSphere Information Server on Cloud: version 11.5

Remediation/Fixes

For IBM InfoSphere Information Server version 8.7, IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations

CVE-2017-3731 –Disable RC4 and MD5 cipher suites.
CVE-2017-3732 –Avoid or disable DHE cipher suites.

Cipher suites can be disabled by using the hidden connection option “CipherList”. This controls which cipher suites can be used by the driver. For information on the format of CipherList, refer to https://www.openssl.org/docs/man1.0.2/apps/ciphers.html

For example, to disable the RC4 and MD5, specify the following value for the undocumented CipherList connection option:
CipherList=DEFAULT:-RC4:-MD5

If you have already specified a value for CipherList, add the following to the existing value:
DEFAULT:-RC4:-MD5