Description
A flaw was found in openshift/builder. This vulnerability allows command injection via path traversal, where a malicious user can execute arbitrary commands on the OpenShift node running the builder container. When using the “Docker” strategy, executable files inside the privileged build container can be overridden using the `spec.source.secrets.secret.destinationDir` attribute of the `BuildConfig` definition. An attacker running code in a privileged container could escalate their permissions on the node running the container.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2024-2857
1. Vulnerability Assessment and Severity Evaluation
The vulnerability identified in the OpenShift builder (EUVD-2024-2857, CVE-2024-7387) allows for command injection via path traversal. This flaw enables a malicious user to execute arbitrary commands on the OpenShift node running the builder container, particularly when using the "Docker" strategy. The vulnerability is rated with a CVSS base score of 9.1, indicating a critical severity level. The CVSS vector (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H) highlights the following characteristics:
- Attack Vector (AV:N): Network-based attack.
- Attack Complexity (AC:L): Low complexity required to exploit.
- Privileges Required (PR:H): High privileges are needed, typically within a privileged container.
- User Interaction (UI:N): No user interaction is required.
- Scope (S:C): The vulnerability affects components beyond its security scope.
- Confidentiality (C:H): High impact on confidentiality.
- Integrity (I:H): High impact on integrity.
- Availability (A:H): High impact on availability.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector involves exploiting the spec.source.secrets.secret.destinationDir attribute in the BuildConfig definition. An attacker with access to a privileged container can manipulate this attribute to override executable files within the container, leading to arbitrary command execution on the host node. This can result in privilege escalation, allowing the attacker to gain higher permissions on the node running the container.
3. Affected Systems and Software Versions
The vulnerability affects multiple versions of the Red Hat OpenShift Container Platform, including:
- Red Hat OpenShift Container Platform 4.17 (patch: v4.17.0-202409122005.p1.gcfcf3bd.assembly.stream.el9)
- Red Hat OpenShift Container Platform 4.15 (patch: v4.15.0-202409101936.p1.ge7749a3.assembly.stream.el8)
- Red Hat OpenShift Container Platform 4.14 (patch: v4.14.0-202409111409.p1.g52565ca.assembly.stream.el8)
- Red Hat OpenShift Container Platform 4.12 (patch: v4.12.0-202409121032.p1.g609473f.assembly.stream.el8)
- Red Hat OpenShift Container Platform 4.13 (patch: v4.13.0-202409120505.p1.g2c7e99d.assembly.stream.el8)
- Red Hat OpenShift Container Platform 4.16 (patch: v4.16.0-202409101737.p1.gfee4b58.assembly.stream.el9)
4. Recommended Mitigation Strategies
To mitigate this vulnerability, the following strategies are recommended:
- Apply Patches: Ensure that all affected versions of the Red Hat OpenShift Container Platform are updated to the latest patched versions as listed above.
- Restrict Privileges: Limit the use of privileged containers and ensure that only trusted users have access to them.
- Monitor and Audit: Implement continuous monitoring and auditing of container activities to detect any suspicious behavior.
- Network Segmentation: Use network segmentation to isolate critical components and reduce the attack surface.
- Regular Security Reviews: Conduct regular security reviews and vulnerability assessments to identify and address potential security issues.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to organizations using the affected versions of the Red Hat OpenShift Container Platform, particularly those in critical infrastructure sectors such as finance, healthcare, and government. The potential for privilege escalation and arbitrary command execution can lead to data breaches, service disruptions, and other severe security incidents. Given the widespread use of OpenShift in European enterprises, prompt action is necessary to prevent exploitation.
6. Technical Details for Security Professionals
- Vulnerability Type: Command Injection via Path Traversal
- Affected Component: OpenShift builder container
- Exploitation Method: Manipulation of
spec.source.secrets.secret.destinationDirattribute inBuildConfig - Impact: Arbitrary command execution on the host node, leading to privilege escalation
- References:
Conclusion
The vulnerability EUVD-2024-2857 in the OpenShift builder is critical and requires immediate attention. Organizations should prioritize patching affected systems and implementing robust security measures to mitigate the risk of exploitation. Continuous monitoring and regular security assessments are essential to maintain a strong security posture in the face of such threats.