#VU24942 Resource exhaustion in Consul and Consul Enterprise - CVE-2020-7219

Vulnerability identifier: #VU24942

Vulnerability risk: Medium

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

CVE-ID: CVE-2020-7219

CWE-ID: CWE-400

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 HTTP/RPC services allowed unbounded resource usage. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Consul: 0.1.0, 0.2.0 - 0.2.1, 0.3.0 - 0.3.1, 0.4.0 - 0.4.1, 0.5.0 - 0.5.2, 0.6.0 - 0.6.4, 0.7.0 - 0.7.5, 0.8.0 - 0.8.5, 0.9.0 - 0.9.4, 1.0.0 - 1.0.8, 1.1.0 - 1.1.1, 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 - 1.6.2

Consul Enterprise: 0.1.0, 0.2.0 - 0.2.1, 0.3.0 - 0.3.1, 0.4.0 - 0.4.1, 0.5.0 - 0.5.2, 0.6.0 - 0.6.4, 0.7.0 - 0.7.5, 0.8.0 - 0.8.5, 0.9.0 - 0.9.4, 1.0.0 - 1.0.8, 1.1.0 - 1.1.1, 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 - 1.6.2

---

External links
https://github.com/hashicorp/consul/issues/7159
https://www.hashicorp.com/blog/category/consul/

---

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.