calling latex from php: security issues

General Tech Bugs & Fixes 2 years ago

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Posted on 16 Aug 2022, this text provides information on Bugs & Fixes related to General Tech. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

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manpreet Tuteehub forum best answer Best Answer 2 years ago

I am trying to program a web interface for automated generation of calculus tests. The idea is to take some input from user, say number of problems and name of instructor, and then by means of php generate the latex file, process it with pdflatex and let user download it.

The procedure seems to be quite straightforward. But what if somebody enters for instructor name something like "Mr. Mackey \input{/etc/hosts}" ?

looks like one can retrieve any file accessible to web server.

How to prevent this? May be there are natural php ways? I am very new to php, and would appreciate any advice.

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