Vulnerability identifier: #VU59042

Vulnerability 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-2021-44717

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nomad
Server applications / Virtualization software

Vendor: HashiCorp

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 when processing HTTP/2 requests. A remote attacker can send multiple HTTP/2 requests to the server and exhaust all available memory resources.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nomad: 1.2.0 - 1.2.2, 1.1.0 - 1.1.8, 1.0.0 - 1.0.14

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External links
http://github.com/hashicorp/nomad/releases/tag/v1.2.3
http://github.com/hashicorp/nomad/releases/tag/v1.0.15
http://github.com/hashicorp/nomad/releases/tag/v1.1.9

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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.