Improper Authentication in HashiCorp Consul

1) Improper Authentication

EUVDB-ID: #VU56146

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-37219

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote attacker can use a specially crafted raft requests to bypass authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Consul: 1.8.0 - 1.10.1

CPE2.3

• cpe:2.3:a:hashicorp:consul:1.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:consul:1.8.1:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:consul:1.8.2:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:consul:1.8.3:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:consul:1.8.4:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:consul:1.8.5:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:consul:1.8.6:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:consul:1.8.7:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:consul:1.8.8:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:consul:1.8.9:*:*:*:*:*:*:*

External links

https://github.com/hashicorp/consul/releases/tag/v1.10.2
https://github.com/hashicorp/consul/releases/tag/v1.8.15
https://github.com/hashicorp/consul/releases/tag/v1.9.9

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.