Security Bulletin: Vulnerability in Curl affects IBM Cloud Private and could allow a remote attacker to bypass security restrictions (CVE-2021-22926)

Summary

There is a vulnerability in the Curl open source library. Curl is used by IBM Cloud Private to transfer data . The vulnerability could allow a remote attacker to bypass security restrictions. This bulletin identifies the security fixes to apply to address the Curl vulnerability (CVE-2021-22926)

Vulnerability Details

CVEID:CVE-2021-22926
**DESCRIPTION:**Curl libcurl could allow a remote attacker to bypass security restrictions, caused by a flaw in the CURLOPT_SSLCERT option mixup with TLS library Secure Transport. By creating a specially-crafted file name with the same name as the app wants to use by name, an attacker could exploit this vulnerability to trick the application to use the file based cert instead of the one referred to by name, and allow libcurl to send the wrong client certificate in the TLS connection handshake.
CVSS Base score: 9.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/206320 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)

Affected Products and Versions

Remediation/Fixes

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:

• IBM Cloud Private 3.2.1.2203

For IBM Cloud Private 3.2.2, apply fix pack:

• IBM Cloud Private 3.2.2.2203

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

None