Security Bulletin: A vulnerability in libgcrypt affects IBM Flex System Manager (FSM) (CVE-2017-7526)

Summary

A vulnerability has been discovered in libgcrypt that is embedded in FSM. This bulletin addresses that issue.

Vulnerability Details

CVEID: CVE-2017-7526**
DESCRIPTION:** Libgcrypt could allow a remote attacker to obtain sensitive information, caused by a cache side-channel attack when using left-to-right sliding window method by the RSA-1024 implementation. By running arbitrary software where the private key is used, an attacker could exploit this vulnerability to obtain the RSA private key.
CVSS Base Score: 6.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/128271 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N)

Affected Products and Versions

Flex System Manager 1.3.4.0
Flex System Manager 1.3.3.0
Flex System Manager 1.3.2.1
Flex System Manager 1.3.2.0

Remediation/Fixes

IBM recommends updating the FSM and all affected remote Common Agent Services (CAS) endpoints using the instructions referenced in this table.

For all other VRMF IBM recommends upgrading to a fixed, supported version/release of the product.

Note: Installation of the fixes provided in the technote will install a cumulative fix package that will update the version of the FSM. Reference the technote for more details.

You should verify applying this fix does not cause any compatibility issues. The fix may disable older encrypted protocols by default.

IBM recommends that you review your entire environment to identify other areas where you have enabled weak encryption and take appropriate mitigation and remediation actions.

For a complete listing of FSM security iFixes go to this technote: http://www-01.ibm.com/support/docview.wss?uid=nas7797054ebc3d9857486258027006ce4a0&myns=purflex&mync=E&cm_sp=purflex--NULL--E

Workarounds and Mitigations

None