# CVE-2023-0845: Consul Server Panic when Ingress and API Gateways Configured with Peering

> Authenticated users with write permissions can crash Consul servers and agents by triggering a null pointer dereference in peering configurations.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Mar 2023
- **Updated:** 28 Feb 2025
- **Also known as:** BIT-consul-2023-0845, GHSA-wj6x-hcc2-f32j, GO-2023-1639, UBUNTU-CVE-2023-0845

## What is CVE-2023-0845?

CVE-2023-0845 is a medium-severity vulnerability in HashiCorp Consul, published on 9 Mar 2023. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Consul and Consul Enterprise allowed an authenticated user with service:write permissions to trigger a workflow that causes Consul server and client agents to crash under certain circumstances. This vulnerability was fixed in Consul 1.14.5.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2023-0845?

4 open source packages ship an affected version, including github.com/hashicorp/consul and consul. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/hashicorp/consul` | Go | From 1.14.0 | 1.14.5 |
| `github.com/hashicorp/consul` | Go | From 1.14.0 | 1.14.5 |
| `github.com/hashicorp/consul` | Go | From 1.14.0 | 1.14.5 |
| `consul` | Bitnami | All versions | 1.14.5 |

Products: Hashicorp Consul.

## How do I fix CVE-2023-0845?

Upgrade github.com/hashicorp/consul to 1.14.5 or later.

## Is CVE-2023-0845 being exploited?

There is no known exploitation of CVE-2023-0845 in the wild and no public exploit code.

## Other vulnerabilities in HashiCorp Consul

- [CVE-2021-41805](https://insights.sbomify.com/CVE-2021-41805/): Privilege escalation in n/a (high 8.8)
- [CVE-2021-37219](https://insights.sbomify.com/CVE-2021-37219/): HashiCorp Consul Privilege Escalation Vulnerability (high 8.8)
- [CVE-2023-2816](https://insights.sbomify.com/CVE-2023-2816/): Consul Envoy Extension Downsteam Proxy Configuration By Upstream Service Owner (high 8.7)
- [CVE-2024-10006](https://insights.sbomify.com/CVE-2024-10006/): Consul L7 Intentions Vulnerable To Headers Bypass (high 8.3)
- [CVE-2024-10005](https://insights.sbomify.com/CVE-2024-10005/): Consul L7 Intentions Vulnerable To URL Path Bypass (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0845 and fix it if it is affected.

What it is: CVE-2023-0845 is a medium-severity vulnerability in HashiCorp Consul, published on 9 Mar 2023. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-0845 in the wild and no public exploit code.

Affected packages and fixed versions:
- github.com/hashicorp/consul (Go): affected from 1.14.0; fixed in 1.14.5
- github.com/hashicorp/consul (Go): affected from 1.14.0; fixed in 1.14.5
- github.com/hashicorp/consul (Go): affected from 1.14.0; fixed in 1.14.5
- consul (Bitnami): affected all versions; fixed in 1.14.5

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-0845/ (Markdown: https://insights.sbomify.com/CVE-2023-0845/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0845
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0845
- OSV: https://osv.dev/vulnerability/CVE-2023-0845

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0845/
Summaries are generated and may contain mistakes; the official description above is the record.