CVE-2022-38060
Description
A privilege escalation vulnerability exists in the sudo functionality of OpenStack Kolla. A misconfiguration in /etc/sudoers within a container can lead to increased privileges.
Statement
To exploit this vulnerability, an attacker would need to have specialized access that allows them to modify how the container is run. The attacker would need to either modify the container's definition (such as by configuring environment variables or selecting the container image) or modify files in the container's file system. Both of these actions are typically restricted by user and group permissions. Hence, the impact for OpenStack is reduced to moderate.
Mitigation
/etc/sudoers within the container should use the `secure_path` option to prevent the PATH environment variable from being modified. However, this will not prevent other possibly dangerous environment variables from being changed. Ideally, the `setenv` option would be removed from /etc/sudoers altogether, and `env_keep` could be used for any safe environment variables that do not introduce security holes.
To avoid container compromises resulting in host compromise, avoid using privileged containers; prefer adding individual capabilities as needed.
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 | 7.8 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
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