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.
Patches
Affected Cortex users are advised to upgrade to v1.13.2 or v1.14.1.
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.
Acknowledgements
Austin Robertson with Amazon Web Services
For more information
If you have any questions or comments about this advisory:
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-apiorenable_api: trueare affected.Patches
Affected Cortex users are advised to upgrade to v1.13.2 or v1.14.1.
Workarounds
Patching is ultimately advised. Using out-of-bound validation, Cortex administrators may reject Alertmanager configurations containing the
api_key_filesetting in theopsgenie_configssection andopsgenie_api_key_filein theglobalsection before sending to the Set Alertmanager Configuration API as a workaround.Acknowledgements
Austin Robertson with Amazon Web Services
For more information
If you have any questions or comments about this advisory: