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doc: fix backticks

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Kay Marquardt (Gnadelwartz) 2021-02-17 13:00:53 +01:00
parent fdbfcebc7c
commit 882efa8f1a
3 changed files with 12 additions and 12 deletions
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4
README.html
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@ -341,7 +341,7 @@ It features background tasks and interactive chats, and can serve as an interfac
<p>Running a Telegram Bot means it is connected to the public and you never know what's send to your Bot.</p> <p>Running a Telegram Bot means it is connected to the public and you never know what's send to your Bot.</p>
<p>Bash scripts in general are not designed to be bulletproof, so consider this Bot as a proof of concept. Bash programmers often struggle with 'quoting hell' and globbing, see <a href="https://unix.stackexchange.com/questions/171346/security-implications-of-forgetting-to-quote-a-variable-in-bash-posix-shells">Implications of wrong quoting</a>.</p> <p>Bash scripts in general are not designed to be bulletproof, so consider this Bot as a proof of concept. Bash programmers often struggle with 'quoting hell' and globbing, see <a href="https://unix.stackexchange.com/questions/171346/security-implications-of-forgetting-to-quote-a-variable-in-bash-posix-shells">Implications of wrong quoting</a>.</p>
<p>Whenever you are processing input from untrusted sources (messages, files, network) you must be as careful as possible (e.g. set IFS appropriately, disable globbing with <code>set -f</code> and quote everything). In addition remove unused scripts and examples from your Bot (e.g. everything in <code>example/</code>) and disable/remove all unused bot commands.</p> <p>Whenever you are processing input from untrusted sources (messages, files, network) you must be as careful as possible (e.g. set IFS appropriately, disable globbing with <code>set -f</code> and quote everything). In addition remove unused scripts and examples from your Bot (e.g. everything in <code>example/</code>) and disable/remove all unused bot commands.</p>
<p>It's important to escape or remove <code>$</code> and <code>\`` in input from user, files or network (_as bashbot does_). One of the powerful features of Unix shells is variable and command substitution using </code>${var}<code>, </code>$(cmd)<code>and</code>`cmd`<code>can lead to remote code execution (RCE) or remote information disclosure (RID) bugs if unescaped</code>$<code>or</code> `<code>is included in untrusted input (e.g.</code>$$<code>or</code>$(rm -rf /*)`).</p> <p>It's important to escape or remove <code>$</code> and ` in input from user, files or network (<em>as bashbot does</em>). One of the powerful features of Unix shells is variable and command substitution using <code>${var}</code>, <code>$(cmd)</code> and `cmd` can lead to remote code execution (RCE) or remote information disclosure (RID) bugs if unescaped <code>$</code> or ` is included in untrusted input (e.g. <code>$$</code> or <code>$(rm -rf /*)</code>).</p>
<p>A powerful tool to improve your scripts is <code>shellcheck</code>. You can <a href="https://www.shellcheck.net/">use it online</a> or <a href="https://github.com/koalaman/shellcheck#installing">install shellcheck locally</a>. Shellcheck is used extensively in bashbot development to ensure a high code quality (e.g. it's not allowed to push changes without passing all shellcheck tests). In addition bashbot has a <a href="doc/7_develop.md">test suite</a> to check if important functionality is working as expected.</p> <p>A powerful tool to improve your scripts is <code>shellcheck</code>. You can <a href="https://www.shellcheck.net/">use it online</a> or <a href="https://github.com/koalaman/shellcheck#installing">install shellcheck locally</a>. Shellcheck is used extensively in bashbot development to ensure a high code quality (e.g. it's not allowed to push changes without passing all shellcheck tests). In addition bashbot has a <a href="doc/7_develop.md">test suite</a> to check if important functionality is working as expected.</p>
<h3>Use printf whenever possible</h3> <h3>Use printf whenever possible</h3>
<p>If you're writing a script that accepts external input (e.g. from the user as arguments or the file system), you shouldn't use echo to display it. <a href="https://unix.stackexchange.com/a/6581">Use printf whenever possible</a>.</p> <p>If you're writing a script that accepts external input (e.g. from the user as arguments or the file system), you shouldn't use echo to display it. <a href="https://unix.stackexchange.com/a/6581">Use printf whenever possible</a>.</p>
@ -392,6 +392,6 @@ It features background tasks and interactive chats, and can serve as an interfac
<p>@Gnadelwartz</p> <p>@Gnadelwartz</p>
<h2>That's it all guys!</h2> <h2>That's it all guys!</h2>
<p>If you feel that there's something missing or if you found a bug, feel free to submit a pull request!</p> <p>If you feel that there's something missing or if you found a bug, feel free to submit a pull request!</p>
<h4>$$VERSION$$ v1.45-dev-36-gf7897fd</h4> <h4>$$VERSION$$ v1.45-dev-37-gfdbfceb</h4>
</body> </body>
</html> </html>

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README.md
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@ -146,9 +146,9 @@ Whenever you are processing input from untrusted sources (messages, files, netwo
(e.g. set IFS appropriately, disable globbing with `set -f` and quote everything). In addition remove unused scripts and examples (e.g. set IFS appropriately, disable globbing with `set -f` and quote everything). In addition remove unused scripts and examples
from your Bot (e.g. everything in `example/`) and disable/remove all unused bot commands. from your Bot (e.g. everything in `example/`) and disable/remove all unused bot commands.
It's important to escape or remove `$` and `\`` in input from user, files or network (_as bashbot does_). It's important to escape or remove `$` and \` in input from user, files or network (_as bashbot does_).
One of the powerful features of Unix shells is variable and command substitution using `${var}`, `$(cmd)` and `\`cmd\`` can lead to remote One of the powerful features of Unix shells is variable and command substitution using `${var}`, `$(cmd)` and \`cmd\` can lead to remote
code execution (RCE) or remote information disclosure (RID) bugs if unescaped `$` or ` \`` is included in untrusted input (e.g. `$$` or `$(rm -rf /*)`). code execution (RCE) or remote information disclosure (RID) bugs if unescaped `$` or \` is included in untrusted input (e.g. `$$` or `$(rm -rf /*)`).
A powerful tool to improve your scripts is `shellcheck`. You can [use it online](https://www.shellcheck.net/) or A powerful tool to improve your scripts is `shellcheck`. You can [use it online](https://www.shellcheck.net/) or
[install shellcheck locally](https://github.com/koalaman/shellcheck#installing). Shellcheck is used extensively in bashbot development [install shellcheck locally](https://github.com/koalaman/shellcheck#installing). Shellcheck is used extensively in bashbot development
@ -242,4 +242,4 @@ See `mycommnds.sh.dist` for an example.
If you feel that there's something missing or if you found a bug, feel free to submit a pull request! If you feel that there's something missing or if you found a bug, feel free to submit a pull request!
#### $$VERSION$$ v1.45-dev-36-gf7897fd #### $$VERSION$$ v1.45-dev-37-gfdbfceb

12
README.txt
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@ -200,11 +200,11 @@ Whenever you are processing input from untrusted sources (messages, files, netwo
must be as careful as possible (e.g. set IFS appropriately, disable globbing with set - must be as careful as possible (e.g. set IFS appropriately, disable globbing with set -
f and quote everything). In addition remove unused scripts and examples from your Bot f and quote everything). In addition remove unused scripts and examples from your Bot
(e.g. everything in example/) and disable/remove all unused bot commands. (e.g. everything in example/) and disable/remove all unused bot commands.
It's important to escape or remove $ and \`` in input from user, files or network (_as It's important to escape or remove $ and ` in input from user, files or network (as
bashbot does_). One of the powerful features of Unix shells is variable and command bashbot does). One of the powerful features of Unix shells is variable and command
substitution using${var},$(cmd)and`cmd`can lead to remote code execution (RCE) or remote substitution using ${var}, $(cmd) and `cmd` can lead to remote code execution (RCE) or
information disclosure (RID) bugs if unescaped$or `is included in untrusted input remote information disclosure (RID) bugs if unescaped $ or ` is included in untrusted
(e.g.$$or$(rm -rf /*)`). input (e.g. $$ or $(rm -rf /*)).
A powerful tool to improve your scripts is shellcheck. You can use it online [https:// A powerful tool to improve your scripts is shellcheck. You can use it online [https://
www.shellcheck.net/] or install shellcheck locally [https://github.com/koalaman/ www.shellcheck.net/] or install shellcheck locally [https://github.com/koalaman/
shellcheck#installing]. Shellcheck is used extensively in bashbot development to ensure a shellcheck#installing]. Shellcheck is used extensively in bashbot development to ensure a
@ -319,5 +319,5 @@ That's it all guys!
If you feel that there's something missing or if you found a bug, feel free to submit a If you feel that there's something missing or if you found a bug, feel free to submit a
pull request! pull request!
$$VERSION$$ v1.45-dev-36-gf7897fd $$VERSION$$ v1.45-dev-37-gfdbfceb