HashiCorp vault-action (aka Vault GitHub Action) before 2.2.0 allows attackers to obtain sensitive information from log files because a multi-line secret was not correctly registered with GitHub Actions for log masking.

The vault-action implementation did not correctly handle the marking of multi-line variables. As a result, multi-line secrets were not correctly masked in vault-action output.

Remediation:
Customers using vault-action should evaluate the risk associated with this issue, and consider upgrading to vault-action 2.2.0 or newer. Please refer to https://github.com/marketplace/actions/hashicorp-vault for more information.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-32074
• hashicorp/vault-action#205
• hashicorp/vault-action#208
• https://discuss.hashicorp.com/t/hcsec-2021-13-vault-github-action-did-not-correctly-mask-multi-line-secrets-in-output/24128
• https://github.com/hashicorp/vault-action/blob/master/CHANGELOG.md
• hashicorp/vault-action@3526e1b