Security Bulletin: Multiple vulnerabilities in glibc affect IBM Flex System Manager (FSM) (CVE-2017-15671, CVE-2017-15670)

Summary

Multiple vulnerabilities have been identified in glibc that is embedded in the FSM. This bulletin addresses these vulnerabilities.

Vulnerability Details

CVEID: CVE-2017-15671**
DESCRIPTION:** GNU C Library is vulnerable to a denial of service, caused by a memory leak in the glob function in glob.c. A remote attacker could exploit this vulnerability to cause a denial of service condition.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/133909 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:H)

CVEID: CVE-2017-15670**
DESCRIPTION:** GNU C Library is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the glob function in glob.c. By sending a specially-crafted string, a remote attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/133915 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:L/A:L)

Affected Products and Versions

Flex System Manager 1.3.4.2
Flex System Manager 1.3.4.1
Flex System Manager 1.3.4.0
Flex System Manager 1.3.3.2
Flex System Manager 1.3.3.1
Flex System Manager 1.3.3.0
Flex System Manager 1.3.2.3
Flex System Manager 1.3.2.2
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