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CVE-2023-29193
No affected components available
SpiceDB is an open source, Google Zanzibar-inspired, database system for creating and managing security-critical application permissions. The spicedb serve command contains a flag named --grpc-preshared-key which is used to protect the gRPC API from being accessed by unauthorized requests. The values of this flag are to be considered sensitive, secret data. The /debug/pprof/cmdline endpoint served by the metrics service (defaulting running on port 9090) reveals the command-line flags provided for debugging purposes. If a password is set via the --grpc-preshared-key then the key is revealed by this endpoint along with any other flags provided to the SpiceDB binary. This issue has been fixed in version 1.19.1.
Impact
All deployments abiding by the recommended best practices for production usage are NOT affected:
- Authzed's SpiceDB Serverless
- Authzed's SpiceDB Dedicated
- SpiceDB Operator
Users configuring SpiceDB via environment variables are NOT affected.
Users MAY be affected if they expose their metrics port to an untrusted network and are configuring --grpc-preshared-key via command-line flag.
Patches
TODO
Workarounds
To workaround this issue you can do one of the following:
- Configure the preshared key via an environment variable (e.g.
SPICEDB_GRPC_PRESHARED_KEY=yoursecret spicedb serve) - Reconfigure the
--metrics-addrflag to bind to a trusted network (e.g.--metrics-addr=localhost:9090) - Disable the metrics service via the flag (e.g.
--metrics-enabled=false) - Adopt one of the recommended deployment models: Authzed's managed services or the SpiceDB Operator
References
- GitHub Security Advisory issued for SpiceDB
- Go issue #22085 for documenting the risks of exposing pprof to the internet
- Go issue #42834 discusses preventing pprof registration to the default serve mux
- semgrep rule go.lang.security.audit.net.pprof.pprof-debug-exposure checks for a variation of this issue
Credit
We'd like to thank Amit Laish, a security researcher at GE Vernova for responsibly disclosing this vulnerability.
The vulnerability can be exploited over a local network, such as Wi-Fi. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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