Incorrect Authorization Affecting github.com/pomerium/pomerium/pkg/grpcutil package, versions <0.27.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published3 Oct 2024
- disclosed2 Oct 2024
- creditUnknown
Introduced: 2 Oct 2024
CVE-2024-47616 Â (opens in a new tab)How to fix?
Upgrade github.com/pomerium/pomerium/pkg/grpcutil to version 0.27.1 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Authorization due to incomplete validation of JSON Web Tokens (JWTs). An attacker can exfiltrate user information, spoof user sessions, or tamper with routes, policies and settings.
Note: This is only exploitable if the deployment uses Pomerium Zero or Pomerium Enterprise, the access token has an explicit future expiration date and the core Pomerium databroker gRPC API is not secured by network access controls.
Workaround
This vulnerability can be mitigated by restricting access to the Pomerium internal gRPC API through network firewall or security group configurations to limit access to trusted sources only.
For Pomerium Zero deployments, disabling the gRPC API listener by setting grpc_address: "" in the YAML configuration file is also recommended.