#VU29133 Improper Resource Shutdown or Release in Consul and Consul Enterprise - CVE-2020-12758

Vulnerability identifier: #VU29133

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-2020-12758

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

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

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External links
https://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md
https://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md
https://github.com/hashicorp/consul/pull/7783

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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.