#VU24941 Information disclosure in Consul and Consul Enterprise - CVE-2020-7955

Vulnerability identifier: #VU24941

Vulnerability risk: Medium

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

CVE-ID: CVE-2020-7955

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 the affected software does not uniformly enforce ACLs across all API endpoints "v1/agent/health/service/*". A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Consul: 1.4.1 - 1.4.5, 1.5.0 - 1.5.3, 1.6.0 - 1.6.2

Consul Enterprise: 1.4.1 - 1.4.5, 1.5.0 - 1.5.3, 1.6.0 - 1.6.2

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External links
https://github.com/hashicorp/consul/issues/7160
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 non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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