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App Runner cross-tenant VPC connectors info leak
Published Mon, Apr 3rd, 2023
Platforms
Summary
The API action ListVpcConnectorsForAccount did not properly validate the "AccountId" parameter that was passed to it. As a result, any account ID could be provided and the API would return the information for that account. This would leak minor information about the VPC configuration for App Runner in the account including the subnet ID, security group ID, and the VPC Connector ARN.
Affected Services
App Runner
Remediation
None required
Tracked CVEs
No tracked CVEs
References
Contributed by https://github.com/frichetten
Entry Status
Finalized
Disclosure Date
Tue, Feb 28th, 2023
Exploitability Period
Until 2023/03/13
Known ITW Exploitation
-
Detection Methods
None
Piercing Index Rating
-
Discovered by
Nick Frichette
