CVE-2024-45496
Description
A flaw was found in OpenShift. This issue occurs due to the misuse of elevated privileges in the OpenShift Container Platform's build process. During the build initialization step, the git-clone container is run with a privileged security context, allowing unrestricted access to the node. An attacker with developer-level access can provide a crafted .gitconfig file containing commands executed during the cloning process, leading to arbitrary command execution on the worker node. An attacker running code in a privileged container could escalate their permissions on the node running the container.
Statement
In all versions of OpenShift, the "Custom" build strategy gives developers permission to run arbitrary commands in a privileged container. This is disabled by default, and documentation explicitly warns that this should only be enabled for highly trusted users (eg: cluster admins). We therefore do not consider this vulnerability a privilege escalation path for "Custom" strategy builds.
Microshift is not affected by this vulnerability. MicroShift does not include this OpenShift API.
The Builds for Red Hat OpenShift Operator based on Shipwright is not affected by this vulnerability.
Mitigation
Cluster admins can follow the instructions in "Securing Builds by Strategy" to block use of the "Docker" and “Source” build strategies on a cluster, or restrict the use to a set of highly trusted users, until the cluster is able to be upgraded.
https://docs.openshift.com/container-platform/4.16/cicd/builds/securing-builds-by-strategy.html
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 | 9.9 | N/A | 9.9 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Changed | N/A | Changed |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | Low | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
Acknowledgements
This issue was discovered by Thibault Guittet (Red Hat).
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