Security Features in Consul - CVE-2019-9764
Published: March 26, 2019 / Updated: August 8, 2020
Vulnerability identifier: #VU36038
CSH Severity: Medium
CVSS v4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-9764
CWE-ID: CWE-254
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
HashiCorp Consul 1.4.3 lacks server hostname verification for agent-to-agent TLS communication. In other words, the product behaves as if verify_server_hostname were set to false, even when it is actually set to true. This is fixed in 1.4.4.
Affected software
Consul
IBM Cloud Pak for Watson AIOps
IBM Cloud Pak for Watson AIOps
How to mitigate CVE-2019-9764
Install update from vendor's website.
IBM Cloud Pak for Watson AIOps - update to 4.1