#VU59042 Resource exhaustion in Nomad - CVE-2021-44717

Vulnerability identifier: #VU59042

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

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

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