Security Bulletin: Multiple Vulnerabilities in GSKit Affect IBM Sterling Connect:Direct for Microsoft Windows

Summary

Vulnerabilities have been found in the IBM GSKit component used by IBM Sterling Connect:Direct for Microsoft Windows. IBM Sterling Connect:Direct for Microsoft Windows has addressed the applicable CVEs.

Vulnerability Details

CVEID:CVE-2017-3732 DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive information, caused by a carry propagating bug in the x86_64 Montgomery squaring procedure. 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&gt; 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-2017-3736 DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive information, caused by a carry propagation flaw in the x86_64 Montgomery squaring function bn_sqrx8x_internal(). An attacker with online access to an unpatched system could exploit this vulnerability to obtain information about the private key.
CVSS Base Score: 5.9
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/134397&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID:***CVE-2018-1427 DESCRIPTION: IBM GSKit contains several environment variables that a local attacker could overflow and cause a denial of service.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/139072&gt; for the current score
CVSS Environmental Score: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

IBM Sterling Connect:Direct for Microsoft Windows 4.7.0.0 through 4.7.0.5_iFix012

Remediation/Fixes

Product

| VRMF|APAR|Remediation/First Fix
—|—|—|—
IBM Sterling Connect:Direct for Microsoft Windows| 4.7.0| IT24136| Apply 4.7.0.5_iFix013, available on Fix Central
For older versions/releases IBM recommends upgrading to a fixed, supported version/release of the product.

Workarounds and Mitigations

To protect the system from issues CVE-2017-3732 & CVE-2017-3736, only use Cipher Suites that start with TLS_ECDHE_ECDSA…