Information disclosure in HashiCorp Consul and Consul Enterprise

1) Information disclosure

EUVDB-ID: #VU48612

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28053

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote attacker with operator:read ACL permissions can read the Connect CA private key configuration.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Consul: 1.2.0 - 1.8.5

Consul Enterprise: 1.2.0 - 1.8.5

External links

http://github.com/hashicorp/consul/blob/master/CHANGELOG.md#186-november-19-2020
http://www.hashicorp.com/blog/category/consul

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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