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GHSA-m9gg-hp2v-232j
@grpc/grpc-js@grpc/grpc-jsImpact
When server credentials are created with the requireClientCertificate option set to false, getAuthContext does not distinguish between authorized and unauthorized certificates in its return value. This can create improper authentication vulnerabilities for @grpc/grpc-js users who use the result of getAuthContext for authentication.
In particular, @grpc/grpc-js-xds can both set the requireClientCertificate option to false and use the return value of getAuthContext for RBAC authentication in some configurations.
Patches
This vulenrability is fixed in 1.13.6 and 1.14.5.
Workarounds
@grpc/grpc-js users using getAuthContext this way can avoid this problem by setting requireClientCertificate to true. @grpc/grpc-js-xds users using RBAC can avoid this by setting the require_client_certificate field to true in the DownstreamTlsContext in the xDS configuration.
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The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
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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