7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.005 Low
EPSS
Percentile
75.4%
IBM Cloud Kubernetes Service is affected by a security vulnerability found in containerd where specially-crafted image configuration could gain access to read-only copies of arbitrary files and directories on the host. This may bypass any policy-based enforcement on container setup (including a Kubernetes Pod Security Policy) and expose potentially sensitive information (CVE-2022-23648).
CVEID: CVE-2022-23648
Description: containerd could allow a remote attacker to obtain sensitive information, caused by a flaw in the CRI implementation. By using a specially-crafted image configuration, an attacker could exploit this vulnerability to access to read-only copies of arbitrary files and directories on the host system, and use this information to launch further attacks against the affected system.
CVSS Base Score: 7.5
CVSS Temporal Score: <https://exchange.xforce.ibmcloud.com/vulnerabilities/220823> for more information
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
IBM Cloud Kubernetes Service 1.23-1.23.4_1521
IBM Cloud Kubernetes Service 1.22-1.22.7_1542
IBM Cloud Kubernetes Service 1.21-1.21.10_1551
IBM Cloud Kubernetes Service 1.20-1.20.15_1572
IBM Cloud Kubernetes Service 1.5-1.19
Updates for IBM Cloud Kubernetes Service cluster worker nodes at versions 1.20 or later are available that fix this vulnerability. Customers must update worker nodes created before the fix was available to address the vulnerability. See updating worker nodes for details on updating worker nodes. To verify your cluster worker nodes have been updated, use the following IBM Cloud CLI command to confirm the currently running versions:
ibmcloud ks workers --cluster <cluster name or ID>
If the versions are at one of the following patch levels or later, the cluster worker nodes have the fix:
1.23.4_1522
1.22.7_1543
1.21.10_1552
1.20.15_1573
Customers running IBM Cloud Kubernetes Service clusters at version 1.19 must upgrade to version 1.20. Please review the documentation before starting an upgrade since additional actions may be required.
Customers running IBM Cloud Kubernetes Service clusters at version 1.18 or earlier must create a new cluster and deploy their apps to the new cluster.
IBM Cloud Kubernetes Service versions 1.19 and earlier are no longer supported, and version 1.20 is deprecated. See the IBM Cloud Kubernetes Service version information and update actions documentation for more information about Kubernetes versions and version support policies.
Monitor the security notifications on the IBM Cloud Status page to be advised of future security bulletins.
Complete CVSS v3 Guide
On-line Calculator v3
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Containerd Security Announcement for CVE-2022-23648
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
*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.
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
[{“Business Unit”:{“code”:“BU059”,“label”:“IBM Software w/o TPS”},“Product”:{“code”:“SSJTBP”,“label”:“IBM Cloud Kubernetes Service and Red Hat OpenShift on IBM Cloud”},“Component”:“–”,“Platform”:[{“code”:“PF025”,“label”:“Platform Independent”}],“Version”:“All Versions”,“Edition”:“”,“Line of Business”:{“code”:“LOB21”,“label”:“Public Cloud Platform”}}]
CPE | Name | Operator | Version |
---|---|---|---|
ibm cloud kubernetes service and red hat openshift on ibm cloud | eq | any |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.005 Low
EPSS
Percentile
75.4%