Re: [PATCH] Fix ob-latex.el command injection vulnerability.

[lux <lx@shellcodes.org>]

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On Sat, 2023-02-18 at 18:15 +0700, Max Nikulin wrote:
> On 18/02/2023 17:08, lux wrote:
> > -              (shell-command (format "mv %s %s" img-out out-
> > file)))))
> > +              (shell-command (format "mv %s %s" (shell-quote-
> > argument img-out) (shell-quote-argument out-file))))))
> 
> Thank you for the patch. Certainly it is an improvement.
> 
> Is there any reason why `rename-file' should be avoided here? I just 
> have discovered this function, so I am unaware of possible pitfalls.
> 
> (info "(elisp) Changing-Files")
> https://www.gnu.org/software/emacs/manual/html_node/elisp/Changing-Files.html#index-rename_002dfile

I think using `rename-file' is good idea. We should use the Emacs
built-in functions as much as possible instead of external shell
commands, becueas these more security.

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From adc0c558b1b091bb4bef77901633f31344b7391a Mon Sep 17 00:00:00 2001
From: Xi Lu <lx@shellcodes.org>
Date: Sat, 18 Feb 2023 18:03:28 +0800
Subject: [PATCH] * lisp/ob-latex.el (org-babel-execute:latex): Fix command
 injection vulnerability.

---
 lisp/ob-latex.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/ob-latex.el b/lisp/ob-latex.el
index 428907a27..0d0a37a02 100644
--- a/lisp/ob-latex.el
+++ b/lisp/ob-latex.el
@@ -180,7 +180,7 @@ This function is called by `org-babel-execute-src-block'."
 	                     tmp-pdf
                              (list org-babel-latex-pdf-svg-process)
                              extension err-msg log-buf)))
-              (shell-command (format "mv %s %s" img-out out-file)))))
+              (rename-file img-out out-file))))
          ((string-suffix-p ".tikz" out-file)
 	  (when (file-exists-p out-file) (delete-file out-file))
 	  (with-temp-file out-file
-- 
2.30.2