CVE-2021-41090 - Grafana Agent is a telemetry collector for sending metrics, logs, and trace data to the opinionated

CVE-2021-41090

Summary

Grafana Agent is a telemetry collector for sending metrics, logs, and trace data to the opinionated Grafana observability stack. Prior to versions 0.20.1 and 0.21.2, inline secrets defined within a metrics instance config are exposed in plaintext over two endpoints: metrics instance configs defined in the base YAML file are exposed at `/-/config` and metrics instance configs defined for the scraping service are exposed at `/agent/api/v1/configs/:key`. Inline secrets will be exposed to anyone being able to reach these endpoints. If HTTPS with client authentication is not configured, these endpoints are accessible to unauthenticated users. Secrets found in these sections are used for delivering metrics to a Prometheus Remote Write system, authenticating against a system for discovering Prometheus targets, and authenticating against a system for collecting metrics. This does not apply for non-inlined secrets, such as `*_file` based secrets. This issue is patched in Grafana Agent versions 0.20.1 and 0.21.2. A few workarounds are available. Users who cannot upgrade should use non-inline secrets where possible. Users may also desire to restrict API access to Grafana Agent with some combination of restricting the network interfaces Grafana Agent listens on through `http_listen_address` in the `server` block, configuring Grafana Agent to use HTTPS with client authentication, and/or using firewall rules to restrict external access to Grafana Agent's API.

References

Vulnerable Configurations

cpe:2.3:a:grafana:agent:0.14.0:-:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:-:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc0:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc0:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc1:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc1:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc2:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc2:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc3:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc3:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc4:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.14.0:rc4:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.15.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.15.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.16.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.16.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.16.1:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.16.1:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.17.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.17.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.1:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.1:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.2:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.2:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.3:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.3:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.4:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.18.4:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.19.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.19.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.20.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.20.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.21.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.21.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.21.1:*:*:*:*:*:*:*
cpe:2.3:a:grafana:agent:0.21.1:*:*:*:*:*:*:*

CVSS

Base:	4.3 (as of 31-03-2022 - 16:30)
Impact:
Exploitability:

CWE

CWE-312

CAPEC

Retrieve Embedded Sensitive Data
An attacker examines a target system to find sensitive data that has been embedded within it. This information can reveal confidential contents, such as account numbers or individual keys/credentials that can be used as an intermediate step in a larger attack.

Access

Vector	Complexity	Authentication
NETWORK	MEDIUM	NONE

Impact

Confidentiality	Integrity	Availability
PARTIAL	NONE	NONE

cvss-vector via4

AV:N/AC:M/Au:N/C:P/I:N/A:N

Last major update

31-03-2022 - 16:30

Published

08-12-2021 - 17:15

Last modified

31-03-2022 - 16:30