# CVE-2024-43383: Apache Lucene.Net.Replicator: Remote Code Execution in Lucene.Net.Replicator

> An attacker can achieve remote code execution by intercepting replication traffic and sending malicious JSON payloads to the Lucene.NET Replicator library.

- **Severity:** High 8.0 (`CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 31 Oct 2024
- **Updated:** 31 Oct 2024
- **Also known as:** GHSA-2qw8-ppr5-m96c

## What is CVE-2024-43383?

CVE-2024-43383 is a high-severity unsafe deserialization vulnerability in Apache Lucene.Net.Replicator, published on 31 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Deserialization of Untrusted Data vulnerability in Apache Lucene.Net.Replicator.

This issue affects Apache Lucene.NET's Replicator library: from 4.8.0-beta00005 through 4.8.0-beta00016.

An attacker that can intercept traffic between a replication client and server, or control the target replication node URL, can provide a specially-crafted JSON response that is deserialized as an attacker-provided exception type. This can result in remote code execution or other potential unauthorized access.

Users are recommended to upgrade to version 4.8.0-beta00017, which fixes the issue.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2024-43383?

2 open source packages ship an affected version, including Lucene.Net.Replicator. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `Lucene.Net.Replicator` | NuGet | From 4.8.0-beta00005 | 4.8.0-beta00017 |
| `Lucene.Net.Replicator` | NuGet | From 4.8.0-beta00005 | 4.8.0-beta00017 |

Products: Apache Lucene.net.

## How do I fix CVE-2024-43383?

Upgrade Lucene.Net.Replicator to 4.8.0-beta00017 or later.

## Is CVE-2024-43383 being exploited?

There is no known exploitation of CVE-2024-43383 in the wild and no public exploit code.

## Other vulnerabilities in Apache Lucene.Net.Replicator

- [CVE-2026-47896](https://insights.sbomify.com/CVE-2026-47896/): Apache Lucene.Net: Unauthenticated arbitrary file read on the Lucene.Net.Replicator replication server (high 8.9)
- [CVE-2026-47897](https://insights.sbomify.com/CVE-2026-47897/): Apache Lucene.Net: Arbitrary file write from malicious server to Lucene.Net.Replicator client (high 8.9)
- [CVE-2026-47898](https://insights.sbomify.com/CVE-2026-47898/): Apache Lucene.Net: XXE vulnerability in Lucene.Net.Analysis.Common PatternParser (medium 4.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-43383 and fix it if it is affected.

What it is: CVE-2024-43383 is a high-severity unsafe deserialization vulnerability in Apache Lucene.Net.Replicator, published on 31 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-43383 in the wild and no public exploit code.

Affected packages and fixed versions:
- Lucene.Net.Replicator (NuGet): affected from 4.8.0-beta00005; fixed in 4.8.0-beta00017
- Lucene.Net.Replicator (NuGet): affected from 4.8.0-beta00005; fixed in 4.8.0-beta00017

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-2024-43383/ (Markdown: https://insights.sbomify.com/CVE-2024-43383/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-43383
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-43383
- OSV: https://osv.dev/vulnerability/CVE-2024-43383

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-43383/
Summaries are generated and may contain mistakes; the official description above is the record.