Vulnerability identifier: #VU29133

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12758

CWE-ID: CWE-404

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 perform a denial of service (DoS) attack. 

The vulnerability exists due to the affected can software crash when configured with an abnormally-formed service-router entry. A remote attacker can cause a denial of service condition on the targeted system. 

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/7783

---

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.