Vulnerability Name:

CVE-2021-41090 (CCN-215062)

Assigned:2021-12-08
Published:2021-12-08
Updated:2022-03-31
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.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
6.4 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-312
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2021-41090

Source: XF
Type: UNKNOWN
grafana-cve202141090-info-disc(215062)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/grafana/agent/commit/af7fb01e31fe2d389e5f1c36b399ddc46b412b21

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/grafana/agent/pull/1152

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/grafana/agent/releases/tag/v0.20.1

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/grafana/agent/releases/tag/v0.21.2

Source: CCN
Type: Grafana GIT Repository
Inline secrets exposure

Source: CONFIRM
Type: Third Party Advisory
https://github.com/grafana/agent/security/advisories/GHSA-9c4x-5hgq-q3wh

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20211229-0004/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:grafana:agent:*:*:*:*:*:*:*:* (Version >= 0.14.0 and < 0.20.1)
  • OR cpe:/a:grafana:agent:*:*:*:*:*:*:*:* (Version >= 0.21.0 and < 0.21.2)

  • Configuration CCN 1:
  • cpe:/a:grafana:agent:0.14.0:-:*:*:*:*:*:*
  • OR cpe:/a:grafana:agent:0.20.0:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    grafana agent *
    grafana agent *
    grafana agent 0.14.0 -
    grafana agent 0.20.0