Overview
About vulnerability
SecretsVerifier in slack-go/slack before v0.23.1 accepts an empty signing secret without error. If an application is misconfigured (e.g., an unset or empty SLACK_SIGNING_SECRET), NewSecretsVerifier builds an HMAC-SHA256 keyed with an empty string, allowing an unauthenticated attacker to forge a valid X-Slack-Signature and bypass Slack request authentication. Fixed in v0.23.1, which rejects empty secrets with ErrInvalidConfiguration. This is patched in version 0.23.1.
Details
- Affected product:
- argocd , argoproj/notifications-engine , slack-go/slack
- Affected packages:
- github.com/slack-go/slack @ 0.16.0 (+2 more)