# CVE-2023-39476: Deserialization in Ignition

> Remote attackers can execute arbitrary code with SYSTEM privileges via unsafe deserialization in Ignition without authentication.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 May 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-7w2x-66hx-wq92

## What is CVE-2023-39476?

CVE-2023-39476 is a critical unsafe deserialization vulnerability in Inductive Automation Ignition, published on 3 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Inductive Automation Ignition JavaSerializationCodec Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Inductive Automation Ignition. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the JavaSerializationCodec class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-20291.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2023-39476?

It affects 1 product.


Products: Inductiveautomation Ignition.

## How do I fix CVE-2023-39476?

No fix has been published for CVE-2023-39476 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-39476 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-39476 exists.

## Other vulnerabilities in Inductive Automation Ignition

- [CVE-2023-39475](https://insights.sbomify.com/CVE-2023-39475/): Deserialization in Ignition (critical 9.8)
- [CVE-2022-35890](https://insights.sbomify.com/CVE-2022-35890/): Auth bypass in n/a (critical 9.8)
- [CVE-2023-39473](https://insights.sbomify.com/CVE-2023-39473/): Deserialization in Ignition (high 8.8)
- [CVE-2023-50218](https://insights.sbomify.com/CVE-2023-50218/): Inductive Automation Ignition ModuleInvoke Deserialization of Untrusted Data Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-50219](https://insights.sbomify.com/CVE-2023-50219/): Inductive Automation Ignition RunQuery Deserialization of Untrusted Data Remote Code Execution Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-39476 and fix it if it is affected.

What it is: CVE-2023-39476 is a critical unsafe deserialization vulnerability in Inductive Automation Ignition, published on 3 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-39476 exists.

Affected product: Inductive Automation Ignition. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2023-39476/ (Markdown: https://insights.sbomify.com/CVE-2023-39476/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-39476
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-39476
- OSV: https://osv.dev/vulnerability/CVE-2023-39476

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-39476/
Summaries are generated and may contain mistakes; the official description above is the record.