VulnerabilityModified
CVE-2021-36213
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.
HIGH 7.5EPSS 1.75%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.75%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.75% probability · 77th percentile
- CISA KEV
- Not listed
- Affected
- hashicorp/consul
- Source
- cve@mitre.org
References
- https://discuss.hashicorp.com/t/hcsec-2021-16-consul-s-application-aware-intentions-deny-action-fails-open-when-combined-with-default-deny-policy/26855Vendor Advisory
- https://github.com/hashicorp/consul/releases/tag/v1.10.1Release Notes, Third Party Advisory
- https://security.gentoo.org/glsa/202208-09Third Party Advisory
- https://www.hashicorp.com/blog/category/consulProduct, Vendor Advisory
- https://discuss.hashicorp.com/t/hcsec-2021-16-consul-s-application-aware-intentions-deny-action-fails-open-when-combined-with-default-deny-policy/26855Vendor Advisory
- https://github.com/hashicorp/consul/releases/tag/v1.10.1Release Notes, Third Party Advisory
- https://security.gentoo.org/glsa/202208-09Third Party Advisory
- https://www.hashicorp.com/blog/category/consulProduct, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.