Security Bulletin: Multiple vulnerabilities in OpenSSL affect IBM Flex System Chassis Management Module (CMM)

Summary

OpenSSL vulnerabilities were disclosed on March 1, 2016 by the OpenSSL Project. OpenSSL is used by IBM Flex System Chassis Management Module. IBM Flex System Chassis Management Module has addressed the applicable CVEs including the “DROWN: Decrypting RSAwith Obsolete and Weakened eNcryption” vulnerability.

Vulnerability Details

Summary

OpenSSL vulnerabilities were disclosed on March 1, 2016 by the OpenSSL Project. OpenSSL is used by IBM Flex System Chassis Management Module. IBM Flex System Chassis Management Module has addressed the applicable CVEs including the “DROWN: Decrypting RSA with Obsolete and Weakened eNcryption” vulnerability.

Vulnerability Details:

CVE-ID: CVE-2016-0800

Description: OpenSSL could allow a remote attacker to bypass security restrictions. By using a server that supports SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle, an attacker could exploit this vulnerability to decrypt TLS sessions between clients and non-vulnerable servers. This vulnerability is also known as the DROWN attack.

CVSS Base Score: 7.4
CVSS Temporal Score: See <http://exchange.xforce.ibmcloud.com/vulnerabilities/111139&gt; for current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVE-ID: CVE-2016-0705

Description: OpenSSL is vulnerable to a denial of service, caused by a double-free error when parsing DSA private keys. An attacker could exploit this vulnerability to corrupt memory and cause a denial of service.

CVSS Base Score: 3.7
CVSS Temporal Score: See <http://exchange.xforce.ibmcloud.com/vulnerabilities/111140&gt; for current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVE-ID: CVE-2016-0799

Description: OpenSSL could allow a remote attacker to obtain sensitive information, caused by a memory error in the BIO_*printf() functions. An attacker could exploit this vulnerability using specially crafted data to trigger an out-of-bounds read.

CVSS Base Score: 3.7
CVSS Temporal Score: See <http://exchange.xforce.ibmcloud.com/vulnerabilities/111143&gt; for current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVE-ID: CVE-2015-3197

Description: OpenSSL could allow a remote attacker to conduct man-in-the-middle attacks, caused by an error related to the negotiation of disabled SSLv2 ciphers by malicious SSL/TLS clients. An attacker could exploit this vulnerability to conduct man-in-the-middle attacks.

CVSS Base Score: 5.4
CVSS Temporal Score: See <http://exchange.xforce.ibmcloud.com/vulnerabilities/110235&gt; for current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N)

Affected Products and Versions

Remediation/Fixes:

Firmware fix versions are available on Fix Central:
<http://www.ibm.com/support/fixcentral/&gt;.

You should verify applying this fix does not cause any compatibility issues.

IBM recommends that the same certificate should ONLY be shared with identical server configuration and software. If the same certificate were shared with different server(s) configuration or software, IBM recommends replacing the different server(s) with unique certificates to protect against the DROWN exposure.

Workarounds and Mitigations:

None.

References:

• Complete CVSS v3 Guide
• On-line Calculator v3

Related Information:
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

None.

Change History
05 April 2016: 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

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an “industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response.” IBM PROVIDES THE CVSS SCORES “AS IS” WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.