CVE-2019-3895
Description
An access-control flaw was found in the Octavia service when the cloud platform was deployed using Red Hat OpenStack Platform Director. An attacker could cause new amphorae to run based on any arbitrary image. This meant that a remote attacker could upload a new amphorae image and, if requested to spawn new amphorae, Octavia would then pick up the compromised image.
Mitigation
To prevent this vulnerability:
1. Update Octavia's configuration setting (octavia.conf) to `amp_image_owner_id = $UUID_OF_SERVICE_PROJECT` on all Octavia nodes.
2. Enable the new configuration by restarting both `octavia_worker` and `octavia_health_manager`.
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 | 5.5 | 8 | 5.5 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | Low | Low | Low |
| Privileges Required | Low | Low | Low |
| User Interaction | Required | Required | Required |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | Low | High | Low |
| Integrity Impact | Low | High | Low |
| Availability Impact | Low | High | Low |
Vector
Red Hat: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
cve.org: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
Acknowledgements
This issue was discovered by Carlos Goncalves (Red Hat).
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