#VU48612 Information disclosure in Consul and Consul Enterprise - CVE-2020-28053

Vulnerability identifier: #VU48612

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-28053

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Consul
Server applications / Other server solutions
Consul Enterprise
Server applications / Other server solutions

Vendor: HashiCorp

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 - 1.2.3, 1.3.0, 1.4.4 - 1.4.5, 1.5.0 - 1.5.3, 1.6.0 - 1.6.9, 1.7.0 - 1.7.9, 1.8.0 - 1.8.5

Consul Enterprise: 1.2.0 - 1.2.4, 1.3.0 - 1.3.1, 1.4.0 - 1.4.5, 1.5.0 - 1.5.3, 1.6.0 - 1.6.9, 1.7.0 - 1.7.9, 1.8.0 - 1.8.5

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

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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.