Improper Authentication Affecting github.com/nats-io/nats-server/v2/server package, versions >=2.2.0 <2.9.23>=2.10.0 <2.10.2
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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- published31 Oct 2023
- disclosed30 Oct 2023
- creditAlex Herrington
Introduced: 30 Oct 2023
CVE-2023-47090 (opens in a new tab)How to fix?
Upgrade github.com/nats-io/nats-server/v2/server to version 2.9.23, 2.10.2 or higher.
Overview
github.com/nats-io/nats-server/v2/server is an A simple, secure and performant communications system for digital systems, services and devices.
Affected versions of this package are vulnerable to Improper Authentication due to an implicit $G user in an authorization block. An attacker can gain unauthenticated access, even when the configuration was intended for each user to have an account.
Note: Without proper access permission users can't access sensitive data.
Workaround
In the "accounts" block, define a second non-system account and leave it empty.
accounts {
SYS: {
users: [
{ user: sysuser, password: makemeasandwich }
]
}
DUMMY: {} # for security, before 2.10.2
}
system_account: SYS