Advisories for Golang/Github.com/Nats-Io/Jwt package

NATS Server 2.x before 2.2.0 and JWT library before 2.0.1 have Incorrect Access Control because Import Token bindings are mishandled.

NATS Server 2.x before 2.2.0 and JWT library before 2.0.1 have Incorrect Access Control because Import Token bindings are mishandled.

The NATS server provides for Subjects which are namespaced by Account; all Subjects are supposed to be private to an account, with an Export/Import system used to grant cross-account access to some Subjects. Some Exports are public, such that anyone can import the relevant subjects, and some Exports are private, such that the Import requires a token JWT to prove permission. The JWT library's validation of the bindings in the …

The NATS server provides for Subjects which are namespaced by Account; all Subjects are supposed to be private to an account, with an Export/Import system used to grant cross-account access to some Subjects. Some Exports are public, such that anyone can import the relevant subjects, and some Exports are private, such that the Import requires a token JWT to prove permission. The JWT library's validation of the bindings in the …

The JWT library in NATS nats-server has Incorrect Access Control because of how expired credentials are handled.

The JWT library in NATS nats-server allows a denial of service (a nil dereference in Go code).

(This advisory is canonically https://advisories.nats.io/CVE/CVE-2020-26521.txt) Problem Description The NATS account system has an Operator trusted by the servers, which signs Accounts, and each Account can then create and sign Users within their account. The Operator should be able to safely issue Accounts to other entities which it does not fully trust. A malicious Account could create and sign a User JWT with a state not created by the normal tooling, …

(This advisory is canonically https://advisories.nats.io/CVE/CVE-2020-26892.txt ) Problem Description NATS nats-server through 2020-10-07 has Incorrect Access Control because of how expired credentials are handled. The NATS accounts system has expiration timestamps on credentials; the https://github.com/nats-io/jwt library had an API which encouraged misuse and an IsRevoked() method which misused its own API. A new IsClaimRevoked() method has correct handling and the nats-server has been updated to use this. The old IsRevoked() method …

(This advisory is canonically https://advisories.nats.io/CVE/CVE-2021-3127.txt) Problem Description The NATS server provides for Subjects which are namespaced by Account; all Subjects are supposed to be private to an account, with an Export/Import system used to grant cross-account access to some Subjects. Some Exports are public, such that anyone can import the relevant subjects, and some Exports are private, such that the Import requires a token JWT to prove permission. The JWT …

(This advisory is canonically https://advisories.nats.io/CVE/CVE-2021-3127.txt) Problem Description The NATS server provides for Subjects which are namespaced by Account; all Subjects are supposed to be private to an account, with an Export/Import system used to grant cross-account access to some Subjects. Some Exports are public, such that anyone can import the relevant subjects, and some Exports are private, such that the Import requires a token JWT to prove permission. The JWT …