Resource exhaustion in nats-server

1) Resource exhaustion

EUVDB-ID: #VU64781

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28466

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can perform a denial of service attack using configs that represent a service export/import cycles.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

nats-server: 0.5.1 - 2.1.9

External links

http://www.openwall.com/lists/oss-security/2021/03/16/1
http://www.openwall.com/lists/oss-security/2021/03/16/2
http://github.com/nats-io/nats-server/pull/1731
http://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMNATSIONATSSERVERSERVER-1042967

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.