CVE-2020-12459
Description
An information-disclosure flaw was found in Grafana distributed by Red Hat. This flaw allows a local attacker access to potentially sensitive information such as secret_key and a bind_password from the world-readable files /etc/grafana/grafana.ini and /etc/grafana/ldap.toml.
Statement
Red Hat Ceph Storage 3 and 4 are not affected by this vulnerability, as the shared grafana container uses grafana v5.2.4 which sets correct permissions for configuration files.
This issue did not affect the version of grafana as shipped with Red Hat Gluster Storage 3, as it ships grafana v4.6.4 which sets correct permissions for configuration files.
In both OpenShift Container Platform (OCP) and OpenShift ServiceMesh (OSSM), the grafana containers set their database files to world readable. However, as it's run in a container image with SELinux MCS labels this prevents other processes on the host from reading it. Therefore, for both (OCP and OSSM) the impact is low.
Mitigation
Manually change the files permission to remove readable bits for others:
# chmod 640 /etc/grafana/grafana.ini /etc/grafana/ldap.toml
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 | 6.2 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data; Read Files or Directories
An attacker may be able to read sensitive information from the associated resource, such as credentials or configuration information stored in a file.
Access Control
Technical Impact: Gain Privileges or Assume Identity
An attacker may be able to modify critical properties of the associated resource to gain privileges, such as replacing a world-writable executable with a Trojan horse.
Integrity,Other
Technical Impact: Modify Application Data; Other
An attacker may be able to destroy or corrupt critical data in the associated resource, such as deletion of records from a database.
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