Security Bulletin
Summary
The following vulnerabilities, including the MD5 "SLOTH" vulnerability on TLS 1.2, affect IBM Flex System Networking Switches.
Vulnerability Details
Summary
The following vulnerabilities, including the MD5 "SLOTH" vulnerability on TLS 1.2, affect IBM Flex System Networking Switches.
Vulnerability Details
CVE-ID: CVE-2015-7575
Description: The TLS protocol could allow weaker than expected security caused by a collision attack when using the MD5 hash function for signing a ServerKeyExchange message during a TLS handshake. An attacker could exploit this vulnerability using man-in-the-middle techniques to impersonate a TLS server and obtain credentials.
CVSS Base Score: 7.1
CVSS Temporal Score: See http://exchange.xforce.ibmcloud.com/vulnerabilities/109415
for current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N)
CVE-ID: CVE-2015-3194
Description: OpenSSL is vulnerable to a denial of service, caused by a NULL pointer dereference when verifying certificates via a malformed routine. An attacker could exploit this vulnerability using signature verification routines with an absent PSS parameter to cause any certificate verification operation to crash.
CVSS Base Score: 5.3
CVSS Temporal Score: See http://exchange.xforce.ibmcloud.com/vulnerabilities/108503
for 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:L)
CVE-ID: CVE-2015-3195
Description: OpenSSL could allow a remote attacker to obtain sensitive information, caused by a memory leak in a malformed X509_ATTRIBUTE structure. An attacker could exploit this vulnerability to obtain CMS data and other sensitive information.
CVSS Base Score: 5.3
CVSS Temporal Score: See http://exchange.xforce.ibmcloud.com/vulnerabilities/108504
for 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)
Affected products and versions
| Product | Affected Version | Fix Version |
|---|---|---|
| IBM Flex System Fabric EN4093R 10Gb Scalable
Switch (ibm_fw_scsw_en4093r-7.8.13.0_anyos_noarch) |
7.8.12.0 | 7.8.13.0 |
| IBM Flex System Fabric CN4093 10Gb Converged
Scalable Switch (ibm_fw_scsw_cn4093-7.8.13.0_anyos_noarch) |
7.8.12.0 | 7.8.13.0 |
| IBM Flex System Fabric SI4093 System Interconnect
Module (ibm_fw_scsw_si4093-7.8.13.0_anyos_noarch) |
7.8.12.0 | 7.8.13.0 |
| IBM Flex System EN2092 1Gb Ethernet Scalable
Switch (ibm_fw_scsw_en2092-7.8.13.0_anyos_noarch) |
7.8.12.0 | 7.8.13.0 |
| Bundle of G8264CS Image, G8264CS SI Fabric Image
and SI4093 Image (G8264CS-SI-Fabric_7.8.13.0.zip) |
7.8.12.0 | 7.8.13.0 |
Remediation/Fixes
Firmware fix versions are available on Fix Central: http://www-933.ibm.com/support/fixcentral/
You should verify applying this fix does not cause any compatibility issues. The fix disables MD5 signature hash by default. If you change the default setting after applying the fix you will expose yourself to the attack described above. IBM recommends that you review your entire environment to identify other areas where you have enabled the MD5 signature hash and take appropriate mitigation and remediation actions.
Workarounds and Mitigations
None.
References
Related Information
IBM
Secure Engineering Web Portal
IBM Product Security
Incident Response Blog
Acknowledgement
Reported to IBM by Karthikeyan Bhargavan at INRIA in Paris, France.
Change History
26 February 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.
Get Notified about Future Security Bulletins
References
*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.
Document Location
Worldwide
Was this topic helpful?
Document Information
Modified date:
30 January 2019
UID
ibm1MIGR-5099200