Vulnerability DatabaseCVE-2021-36213
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CVE-2021-36213
Published:July 17, 2021
Updated:September 21, 2026
HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. Fixed in 1.9.8 and 1.10.1.
Affected Packages
github.com/hashicorp/consul (GO):
Affected version(s) >=b15301db789cec43acd1c3070afe6110ff91e32a <v1.10.1
Fix Suggestion:
Update to version v1.10.1
Related Resources (7)
https://www.hashicorp.com/blog/category/consul
https://discuss.hashicorp.com/t/hcsec-2021-16-consul-s-application-aware-intentions-deny-action-fails-open-when-combined-with-default-deny-policy/26855
https://github.com/hashicorp/consul
https://github.com/advisories/GHSA-8h2g-r292-j8xh
https://security.gentoo.org/glsa/202208-09
https://nvd.nist.gov/vuln/detail/CVE-2021-36213
https://github.com/hashicorp/consul/releases/tag/v1.10.1
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
EPSS
Base Score:
1.69