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Consul Server Panic when Ingress and API Gateways Configured with Peering Connections

Moderate severity GitHub Reviewed Published Mar 9, 2023 to the GitHub Advisory Database • Updated Sep 20, 2023

Package

gomod github.com/hashicorp/consul (Go)

Affected versions

>= 1.14.0, < 1.14.5

Patched versions

1.14.5

Description

A vulnerability was identified in Consul and Consul Enterprise (“Consul”) an authenticated user with service:write permissions could trigger a workflow that causes Consul server and client agents to crash under certain circumstances. To exploit this vulnerability, an attacker requires access to an ACL token with service:write permissions, and there needs to be at least one running ingress or API gateway that is configured to route traffic to an upstream service.

References

Published by the National Vulnerability Database Mar 9, 2023
Published to the GitHub Advisory Database Mar 9, 2023
Reviewed Mar 16, 2023
Last updated Sep 20, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.136%
(50th percentile)

Weaknesses

CVE ID

CVE-2023-0845

GHSA ID

GHSA-wj6x-hcc2-f32j

Source code

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