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Security Advisories: GSA_kwCzR0hTQS1jcTJnLXB3NnEtaGY3as4AAwaq

Cortex's Alertmanager can expose local files content via specially crafted config

Impact

A local file inclusion vulnerability exists in Cortex versions v1.13.0, v1.13.1 and v1.14.0, where a malicious actor could remotely read local files as a result of parsing maliciously crafted Alertmanager configurations when submitted to the Alertmanager Set Configuration API. Only users of the Cortex Alertmanager service using -experimental.alertmanager.enable-api or enable_api: true are affected.

Specific Go Packages Affected

github.com/cortexproject/cortex/pkg/alertmanager

Patches

Affected Cortex users are advised to upgrade to versions 1.13.2 or 1.14.1.

Workarounds

Patching is ultimately advised. Using out-of-bound validation, Cortex administrators may reject Alertmanager configurations containing the api_key_file setting in the opsgenie_configs section and opsgenie_api_key_file in the global section before sending to the Set Alertmanager Configuration API as a workaround.

References

• Fixed Versions:
  • https://github.com/cortexproject/cortex/releases/tag/v1.14.1
  • https://github.com/cortexproject/cortex/releases/tag/v1.13.2
• https://cortexmetrics.io/docs/api/#set-alertmanager-configuration

For more information

If you have any questions or comments about this advisory:

• Open an issue in cortex
• Email us at [email protected].

Permalink: https://github.com/advisories/GHSA-cq2g-pw6q-hf7j
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1jcTJnLXB3NnEtaGY3as4AAwaq
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 1 year ago
Updated: 7 months ago

CVSS Score: 6.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Identifiers: GHSA-cq2g-pw6q-hf7j, CVE-2022-23536
References:

• https://github.com/cortexproject/cortex/security/advisories/GHSA-cq2g-pw6q-hf7j
• https://cortexmetrics.io/docs/api/#set-alertmanager-configuration
• https://github.com/cortexproject/cortex/releases/tag/v1.13.2
• https://github.com/cortexproject/cortex/releases/tag/v1.14.1
• https://nvd.nist.gov/vuln/detail/CVE-2022-23536
• https://github.com/cortexproject/cortex/commit/03e023d8b012887b31cc268d0d011b01e1e65506
• https://pkg.go.dev/vuln/GO-2022-1175
• https://github.com/advisories/GHSA-cq2g-pw6q-hf7j

Repository: https://github.com/cortexproject/cortex
Blast Radius: 18.1

Affected Packages