CVE-2020-10712
Description
A flaw was found in OpenShift Container Platform versions from 4.1 to 4.4 inclusive. Sensitive information was found to be logged by the image registry operator allowing an attacker able to gain access to those logs, to read and write to the storage backing the internal image registry. The highest threat from this vulnerability is to data integrity.
Statement
References to internal container components making up OpenShift Container Platform 4.x itself all use digests to refer to container images [1]. Therefore any changes to the images in the registry storage will invalidate those references. This issue could allow an attacker to modify other container image content that is referred to by tag however.
[1] https://www.redhat.com/en/blog/securing-deployment-openshift-container-platform-4
Mitigation
Ensure that the image registry operator logs remain private.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7 | 8.2 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | High | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | Low | Low | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | Low | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Red Hat CVSS v3 Score Explanation
An attack relies upon having access to the image registry operator logs. An attacker would not normally have access to such logs, so would have to invest some amount of effort to gain that access. Also some degree of availability impact exists because images could be deleted from the registry. Causing an outage when trying to migrate or deploy new workloads depending on the node image pull policy configuration.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
Logging sensitive user data, full path names, or system information often provides attackers with an additional, less-protected path to acquiring the information.
Acknowledgements
This issue was discovered by Adam Kaplan (Red Hat).
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