CVE-2023-2816

Consul Envoy Extension Downsteam Proxy Configuration By Upstream Service Owner

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

Consul and Consul Enterprise allowed any user with service:write permissions to use Envoy extensions configured via service-defaults to patch remote proxy instances that target the configured service, regardless of whether the user has permission to modify the service(s) corresponding to those modified proxies.

Multiple vulnerabilities have been discovered in HashiCorp Consul, the worst of which could result in denial of service. Versions greater than or equal to 1.15.10 are affected.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Complete

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2023-05-19 CVE Reserved
2023-06-02 CVE Published
2024-10-07 CVE Updated
2025-04-15 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-266: Incorrect Privilege Assignment
CWE-284: Improper Access Control

CAPEC

CAPEC-113: Interface Manipulation

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://discuss.hashicorp.com/t/hcsec-2023-16-consul-envoy-extension-downstream-proxy-configuration-by-upstream-service-owner/54525	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Hashicorp Search vendor "Hashicorp"		Consul Search vendor "Hashicorp" for product "Consul"				>= 1.15.0 < 1.15.3 Search vendor "Hashicorp" for product "Consul" and version " >= 1.15.0 < 1.15.3"		-		Affected
Hashicorp Search vendor "Hashicorp"		Consul Search vendor "Hashicorp" for product "Consul"				>= 1.15.0 < 1.15.3 Search vendor "Hashicorp" for product "Consul" and version " >= 1.15.0 < 1.15.3"		enterprise		Affected