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Security Bulletin: IBM Cloud Private is vulnerable to a Python vulnerability (CVE-2020-25659)

Security Bulletin


IBM Cloud Private is vulnerable to a Python vulnerability

Vulnerability Details

CVEID:   CVE-2020-25659
DESCRIPTION:   python-cryptography could allow a remote attacker to obtain sensitive information, caused by a Bleichenbacher timing attack. By sending a specially-crafted request using the RSA decryption API, an attacker could exploit this vulnerability to obtain parts of the cipher text encrypted with RSA, and use this information to launch further attacks against the affected system.
CVSS Base score: 5.9
CVSS Temporal Score: See: for the current score.
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

Affected Product(s)Version(s)
IBM Cloud Private3.2.1 CD
IBM Cloud Private3.2.2 CD


Product defect fixes and security updates are only available for the two most recent Continuous Delivery (CD) update packages
  • IBM Cloud Private 3.2.1
  • IBM Cloud Private 3.2.2
For IBM Cloud Private 3.2.1, apply fix pack:
For IBM Cloud Private 3.2.2, apply fix pack:

For IBM Cloud Private 3.1.0, 3.1.1, 3.1.2, 3.2.0:

  • Upgrade to the latest Continuous Delivery (CD) update package, IBM Cloud Private 3.2.2. 
  • If required, individual product fixes can be made available between CD update packages for resolution of problems. Contact IBM support for assistance

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

26 Feb 2021: Initial Publication

*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.


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.

Document Location


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Document Information

Modified date:
26 February 2021