Vulnerability identifier: #VU29132

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12797

CWE-ID: CWE-264

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 escalate privileges on the system.

The vulnerability exists due to the affected software fails to enforce changes to legacy ACL token rules due to non-propagation to secondary data centers, which leads to security restrictions bypass and privilege escalation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Consul: 1.7.0 - 1.7.3, 1.6.0 - 1.6.5, 1.5.0 - 1.5.3, 1.4.0 - 1.4.5

Consul Enterprise: 1.7.0 - 1.7.3, 1.6.0 - 1.6.5, 1.5.0 - 1.5.3, 1.4.0 - 1.4.5

---

External links
http://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md
http://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md
http://github.com/hashicorp/consul/pull/8047

---

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.