AWS bedrock-agentcore documentation change
Summary
Added documentation about unique OAuth2 callback URLs for session binding protection and updated configuration steps
Security assessment
The change documents how unique callback URLs protect against cross-provider replay and CSRF attacks in OAuth2 flows. It describes a security feature enhancement but doesn't indicate resolution of a specific security incident.
Diff
diff --git a/bedrock-agentcore/latest/devguide/identity-idp-reddit.md b/bedrock-agentcore/latest/devguide/identity-idp-reddit.md index 0f329fcd7..8746c66f2 100644 --- a//bedrock-agentcore/latest/devguide/identity-idp-reddit.md +++ b//bedrock-agentcore/latest/devguide/identity-idp-reddit.md @@ -15 +15 @@ Reddit can be configured as an AgentCore Identity credential provider for outbou -**Step 1** +###### Note @@ -17 +17,5 @@ Reddit can be configured as an AgentCore Identity credential provider for outbou -Use the following procedure to set up a Reddit OAuth2 application and obtain the necessary client credentials for AgentCore Identity. +AgentCore Identity issues a unique OAuth2 callback URL for each credential provider you create. The unique callback URL enables session binding, which protects the OAuth2 authorization-code exchange against cross-provider replay and CSRF-style attacks by ensuring an authorization response can only be redeemed against the specific credential provider that initiated it. Because the URL is unique per provider, you won’t know it until **after** you call `CreateOauth2CredentialProvider`. Create your Reddit OAuth2 client first, then return to the Reddit developer console to register the callback URL once AgentCore Identity has issued it. + +**Step 1: Create the Reddit OAuth2 client** + +Use the following procedure to set up a Reddit OAuth2 application and obtain the necessary client credentials for AgentCore Identity. You will register the redirect URI in Step 3, after AgentCore Identity issues the unique callback URL. @@ -27,3 +31 @@ Use the following procedure to set up a Reddit OAuth2 application and obtain the - 4. Configure the following as the redirect URI for the application: - - https://bedrock-agentcore.region.amazonaws.com/identities/oauth2/callback + 4. Leave the redirect URI field empty for now — you will add the unique callback URL in Step 3. @@ -38 +40 @@ For more details, refer to [Reddit’s OAuth2 documentation](https://github.com/ -**Step 2** +**Step 2: Create the AgentCore Identity credential provider** @@ -53,0 +56,15 @@ To configure Reddit as an outbound resource provider, use the following: +The [CreateOauth2CredentialProvider](https://docs.aws.amazon.com/bedrock-agentcore-control/latest/APIReference/API_CreateOauth2CredentialProvider.html) response includes a `callbackUrl` field. This URL is unique to this credential provider and looks like: `https://bedrock-agentcore.us-east-1.amazonaws.com/identities/oauth2/callback/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX`. Save this value for the next step. + +**Step 3: Register the unique callback URL with Reddit** + +Return to the Reddit developer console and add the unique callback URL to your OAuth2 application’s redirect URI list. + + 1. Sign in to the Reddit developer console and open the OAuth2 application you created in Step 1. + + 2. Add the `callbackUrl` value returned by `CreateOauth2CredentialProvider` to the application’s redirect URI configuration. + + 3. Save your changes. + + + +