GHSA-mpwp-42x6-4wmx BIT-grafana-2021-41244 CVE-2021-41244
Grafana Fine-grained access control vulnerability
- Severity
- 9.1 / 10
- Critical · CVSS 3.1
- Exploit chance (EPSS)
- 2.89%
- Chance of exploitation in the next 30 days. Higher than 86.89% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-610 Externally Controlled Reference to a Resource in Another Sphere
- CWE-863 Incorrect Authorization
- Fix
8.2.4- Upgrade github.com/grafana/grafana to this version or later
Description
Impact
On Nov. 2, during an internal security audit, we discovered that when the fine-grained access control beta feature is enabled and there is more than one organization in the Grafana instance, Grafana 8.0 introduced a mechanism which allowed users with the Organization Admin role to list, add, remove, and update users’ roles in other organizations in which they are not an admin.
Patches
Fixed in 8.2.4
Workarounds
All installations between v8.0 and v8.2.3 that have fine-grained access control beta enabled and more than one organization should be upgraded as soon as possible. If you cannot upgrade, you should turn off the fine-grained access control using a feature flag.
Grafana Cloud instances have not been affected by the vulnerability.
Reporting security issues
If you think you have found a security vulnerability, please send a report to security@grafana.com. This address can be used for all of Grafana Labs' open source and commercial products (including, but not limited to Grafana, Grafana Cloud, Grafana Enterprise, and grafana.com). We can accept only vulnerability reports at this address. We would prefer that you encrypt your message to us by using our PGP key. The key fingerprint is
F988 7BEA 027A 049F AE8E 5CAA D125 8932 BE24 C5CA
The key is available from keyserver.ubuntu.com.
Security announcements
We maintain a security category on our blog, where we will always post a summary, remediation, and mitigation details for any patch containing security fixes.
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Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| github.com/grafana/grafana | >= 8.0.0, < 8.2.4 |
8.2.4 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
github.com/grafana/grafana Go → 8.2.4
- go
go get github.com/grafana/grafana@v8.2.4 && go mod tidy
Severity breakdown
CVSS 3.1 9.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- High
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Weakness
CWE-610: Externally Controlled Reference to a Resource in Another Sphere
The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.
CWE-863: Incorrect Authorization
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
How to prevent it
- Architecture and Design: Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) [REF-229] to enforce the roles at the appropriate boundaries. Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
- Architecture and Design: Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records. For example, a database may restrict access for medical records to a specific database user, but each record might only be intended to be accessible to the patient and the patient's doctor [REF-7].
- Architecture and Design: Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using authorization frameworks such as the JAAS Authorization Framework [REF-233] and the OWASP ESAPI Access Control feature [REF-45].
- Architecture and Design: For web applications, make sure that the access control mechanism is enforced correctly at the server side on every page. Users should not be able to access any unauthorized functionality or information by simply requesting direct access to that page. One way to do this is to ensure that all pages containing sensitive information are not cached, and that all such pages restrict access to requests that are accompanied by an active and authenticated session token associated with a user who has the required permissions to access that page.
- System Configuration, Installation: Use the access control capabilities of your operating system and server environment and define your access control lists accordingly. Use a "default deny" policy when defining these ACLs.
References
Advisories
Packages
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-8pjx-jj86-j47p Grafana path traversal | High Known exploited | Also affects github.com/grafana/grafana |
| CVE-2021-39226 Authentication bypass for viewing and deletions of snapshots | High Known exploited | Also affects github.com/grafana/grafana |
| GHSA-3w66-95m3-8jxg Grafana: Pre-authentication denial of service in the public dashboard query handler | High | Also affects github.com/grafana/grafana |
| GHSA-9g84-39mm-q4p3 Grafana geomap panel's XYZ tile layer has a sanitize-then-interpolate ordering bug | Medium | Also affects github.com/grafana/grafana |
| GHSA-f74p-cwhp-x2wx Grafana Loki datasource plugin's callResource handler contains a path traversal vulnerability. | High | Also affects github.com/grafana/grafana |
| GHSA-9493-h4f5-633x Grafana: Path traversal in the Tempo and Loki data source plugins | Medium | Also affects github.com/grafana/grafana |
| GHSA-wfhv-mj62-f5xh Grafana: Users can generate Service Account tokens after permissions removal | High | Also affects github.com/grafana/grafana |
| GHSA-gxcp-jjxh-rwp4 Grafana: SQL Expressions Read File From Disk | Medium | Also affects github.com/grafana/grafana |
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