Security Bulletin
Summary
The MD5 “SLOTH” vulnerability on TLS 1.2 affects Sterling Integrator and Sterling File Gateway.
Vulnerability Details
CVEID: 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 https://exchange.xforce.ibmcloud.com/vulnerabilities/109415 for the 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)
Affected Products and Versions
Sterling Integrator 5.1
Sterling File Gateway 2.1
Workarounds and Mitigations
The following table provides instructions on how to make configuration changes to Sterling Integrator 5.1. After making the necessary changes, you will need to stop and restart Sterling Integrator in order for these changes to take effect.
| If you use: | Then do this: |
| Sterling Integrator 5.1 or Sterling File Gateway 2.1 |
security.dashboardCipherSuite=strong security.WeakCipherSuite=TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_DES_CBC_SHA security.StrongCipherSuite=TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_DES_CBC_SHA security.AllCipherSuite=TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_DES_CBC_SHA IBM recommends the use of strong ciphers in the configuration for adapters and services. |
| WSMQ adapters and services MQFTE adapters and services CD:Server adapters and services | IBM recommends the use of strong ciphers in the configuration for adapters and services and not to use the cipher with MD5. |
You should verify applying this configuration change does not cause any compatibility issues. Not disabling the MD5 stream cipher 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 stream cipher and take appropriate mitigation and remediation actions.
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References
Acknowledgement
Reported to IBM by Karthikeyan Bhargavan at INRIA in Paris, France.
Change History
22 January 2015: 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:
04 February 2020
UID
swg21974786