Security Bulletin: IBM Security Key Lifecycle Manager uses weaker than expected cryptographic algorithms (CVE-2019-4516)

Security Bulletin

Summary

IBM Security Key Lifecycle Manager uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.

Vulnerability Details

CVEID: CVE-2018-1751
DESCRIPTION: IBM Tivoli Key Lifecycle Manager uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/148512 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-2019-4516
DESCRIPTION: IBM Tivoli Key Lifecycle Manager uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/165138 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)

Affected Products and Versions

Principal Product and Version(s)
IBM Security Key Lifecycle Manager (SKLM) v3.0 - v3.0.0.3 on distributed platforms
IBM Security Key Lifecycle Manager (SKLM) v3.0.1- v3.0.1.2 on distributed platforms

Workarounds and Mitigations

For SKLM v3.0 - 3.0.0.3 and v3.0.1 - 3.0.1.2, if found affected, you may follow the steps below to mitigate the issue:

1) Use Update Config Property REST Service or tklmConfigUpdateEntry CLI to update the property "Transport.ssl.vulnerableciphers.patterns".
2) Value of the property should be pattern that user wants to block.
    Example :To block all the ciphers with DES , property and its value would be:
       Transport.ssl.vulnerableciphers.patterns=_RC4_,RSA_EXPORT,_DES_
        This will ensure that all the ciphers with DES are blocked.

3) Restart IBM Security Key Lifecycle Manager Server.

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References

Complete CVSS v3 Guide
On-line Calculator v3

Acknowledgement

IBM X-Force Ethical Hacking Team: Warren Moynihan, Jonathan Fitz-Gerald, John Zuccato, Rodney Ryan, Chris Shepherd, Dmitriy Beryoza

*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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Tips

Security Bulletin: IBM Security Key Lifecycle Manager uses weaker than expected cryptographic algorithms (CVE-2019-4516)