Security Bulletin
Summary
Multiple vulnerabilities have been identified in OpenSSL that is embedded in the FSM. This bulletin addresses these vulnerabilities.
Vulnerability Details
CVEID: CVE-2017-3735
DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive information, caused by an error while parsing an IPAdressFamily extension in an X.509 certificate. An attacker could exploit this vulnerability to trigger an out-of-bounds read, resulting in an incorrect text display of the certificate.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/131047 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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 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-2017-3738
DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive information, caused by an overflow bug in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli. An attacker could exploit this vulnerability to obtain information about the private key. Note: In order to exploit this vulnerability, the server would have to share the DH1024 private key among multiple clients, which is no longer an option since CVE-2016-0701.
CVSS Base Score: 3.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/136078 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N)
CVEID: CVE-2017-3737
DESCRIPTION: OpenSSL could allow a remote attacker to bypass security restrictions, caused by a flaw in the \"error state\" mechanism when directly calling SSL_read() or SSL_write() for an SSL object after receiving a fatal error. An attacker could exploit this vulnerability to bypass the decryption or encryption process and perform unauthorized actions.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/136077 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:L/A:N)
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.
| Product | VRMF | Remediation |
| Flex System Manager | 1.3.4.0 1.3.4.1 1.3.4.2 | Navigate to the Support Portal and search for technote 847550927 for instructions on installing updates for FSM version 1.3.4 and Agents. |
| Flex System Manager | 1.3.3.0 1.3.3.1 1.3.3.2 | Navigate to the Support Portal and search for technote 847550927 for instructions on installing updates for FSM version 1.3.3 and Agents. |
| Flex System Manager | 1.3.2.0 1.3.2.1 1.3.2.2 1.3.2.3 | Navigate to the Support Portal and search for technote 847550927 for instructions on installing updates for FSM version 1.3.2 and Agents. |
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
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References
Change History
30 March 2018: Original version published
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
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Document Information
Modified date:
17 June 2018
UID
isg3T1027355