CVE-2022-42889 PoC — Apache Commons Text prior to 1.10.0 allows RCE when applied to untrusted input due to insecure interpolation defaults

Source

https://github.com/humbss/CVE-2022-42889

Associated Vulnerability

Title: Apache Commons Text prior to 1.10.0 allows RCE when applied to untrusted input due to insecure interpolation defaults (CVE-2022-42889)
Description:Apache Commons Text performs variable interpolation, allowing properties to be dynamically evaluated and expanded. The standard format for interpolation is "${prefix:name}", where "prefix" is used to locate an instance of org.apache.commons.text.lookup.StringLookup that performs the interpolation. Starting with version 1.5 and continuing through 1.9, the set of default Lookup instances included interpolators that could result in arbitrary code execution or contact with remote servers. These lookups are: - "script" - execute expressions using the JVM script execution engine (javax.script) - "dns" - resolve dns records - "url" - load values from urls, including from remote servers Applications using the interpolation defaults in the affected versions may be vulnerable to remote code execution or unintentional contact with remote servers if untrusted configuration values are used. Users are recommended to upgrade to Apache Commons Text 1.10.0, which disables the problematic interpolators by default.

Readme

# CVE-2022-42889 Test application

This repository contains a simple application using Apache Commons Text < 1.10 which is vulnerable to CVE-2022-42889.

## Running the application

Replace `DemoApplication.java` nc command by your host ip address. 


Listening with netcat:

```sh
$ nc -l -p 30000
```

Build and run docker vulnerable code

```bash
docker build . -t vulnerable-app
docker run vulnerable-app
```

As you can see netcat will be able to execute remote commands

File Snapshot

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