Denial of Service (DoS) Affecting github.com/nats-io/gnatsd/server package, versions <2.2.0
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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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMNATSIOGNATSDSERVER-7693463
- published16 Aug 2024
- disclosed22 Nov 2020
- creditderekcollison
Introduced: 22 Nov 2020
CVE-2020-28466 (opens in a new tab)How to fix?
Upgrade github.com/nats-io/gnatsd/server to version 2.2.0 or higher.
Overview
github.com/nats-io/gnatsd/server is a routing mechanism to handle subject distribution and provides a facility to match subjects from published messages to interested subscribers. Subscribers can have wildcard subjects to match multiple published subjects.
Affected versions of this package are vulnerable to Denial of Service (DoS). Untrusted accounts are able to crash the server using configs that represent a service export/import cycles.
Disclaimer from the maintainers:
Running a NATS service which is exposed to untrusted users presents a heightened risk. Any remote execution flaw or equivalent seriousness, or denial-of-service by unauthenticated users, will lead to prompt releases by the NATS maintainers. Fixes for denial of service issues with no threat of remote execution, when limited to account holders, are likely to just be committed to the main development branch with no special attention. Those who are running such services are encouraged to build regularly from git.
Details
Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.
Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.
One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.
When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.
Two common types of DoS vulnerabilities:
High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.
Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm
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