CVE-2016-4383
Description
An immutability flaw was discovered in openstack-glance, where the glance-manage DB allows deleted image IDs to be reassigned. The flaw could be exploited to allow remote authenticated users to cause other users to boot into a malicious image without knowing it.
Mitigation
For this flaw to be exploited, both non-admin image upload must be permitted and records of deleted IDs must have been purged from the openstack-glance 'images' database table.
To prevent flaw exploitation:
* Do not allow non-admin users to upload images, or
* If you do permit normal users to upload images, do not purge the 'images' table. Note: It is safe to delete rows from `image_properties`, `image_tags`, `image_members`, and `image_locations` tables.
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).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.7 | 8.4 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | High | N/A |
| User Interaction | Required | Required | N/A |
| Scope | Unchanged | Changed | N/A |
| Confidentiality | None | High | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | None | High | N/A |
Vector
Red Hat: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
NVD: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Application Data
Common data types that are attacked are environment variables, web application parameters, and HTTP headers.
Integrity
Technical Impact: Unexpected State
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