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From: Andreas Schwab <schwab@linux-m68k.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: lux <lx@shellcodes.org>,
	manikulin@gmail.com, 66390@debbugs.gnu.org,
	michael.albinus@gmx.de
Subject: bug#66390: `man' allows to inject arbitrary shell code
Date: Mon, 09 Oct 2023 19:20:03 +0200	[thread overview]
Message-ID: <87sf6ju30c.fsf@igel.home> (raw)
In-Reply-To: <834jizwxm2.fsf@gnu.org> (Eli Zaretskii's message of "Mon, 09 Oct 2023 19:48:21 +0300")

On Okt 09 2023, Eli Zaretskii wrote:

>> From: lux <lx@shellcodes.org>
>> Cc: 66390@debbugs.gnu.org, michael.albinus@gmx.de
>> Date: Tue, 10 Oct 2023 00:30:06 +0800
>> 
>> There is indeed an code injection vulnerability issue here, for example:
>> 
>>   (man ";ls")    <-- The `ls' command will be executed.
>
> So does this:
>
>   (shell-command "ls")

shell-command does what it is supposed to do.  man, on the other hand,
is supposed to display a manpage, _not_ execute an arbitrary command
line.  While the doc string of the man command says that it runs a
command to do its work, it does not explain how man-args is related to
that command.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."





  parent reply	other threads:[~2023-10-09 17:20 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-07 12:47 bug#66390: `man' allows to inject arbitrary shell code Maxim Nikulin
2023-10-07 13:04 ` Eli Zaretskii
2023-10-07 14:12   ` Max Nikulin
2023-10-07 14:19     ` Eli Zaretskii
2023-10-07 14:29       ` Max Nikulin
2023-10-07 15:10         ` Eli Zaretskii
2023-10-07 15:37         ` Michael Albinus
2023-10-07 15:58           ` Eli Zaretskii
2023-10-07 16:55             ` Michael Albinus
2023-10-07 17:24               ` Eli Zaretskii
2023-10-07 17:45                 ` Michael Albinus
2023-10-07 18:26                   ` Eli Zaretskii
2023-10-08  3:37                     ` Max Nikulin
2023-10-08  5:28                       ` Eli Zaretskii
2023-10-09 15:12                         ` Max Nikulin
2023-10-09 15:52                           ` Eli Zaretskii
2023-10-09 16:30                         ` lux
2023-10-09 16:48                           ` Eli Zaretskii
2023-10-09 17:07                             ` Ihor Radchenko
2023-10-09 17:20                             ` Andreas Schwab [this message]
2023-10-10  2:47                             ` lux
2023-10-10  7:43                             ` Stefan Kangas
2023-10-10 12:11                               ` Eli Zaretskii
2023-10-10 12:25                                 ` Stefan Kangas
2023-10-10 11:09                             ` Max Nikulin
2023-10-10 10:54                           ` Max Nikulin
2023-10-10 14:30                             ` lux
2023-10-10 16:21                               ` Andreas Schwab
2023-10-11  3:08                                 ` lux
2023-10-11 10:46                                   ` Max Nikulin
2023-10-20 21:00                                   ` Stefan Kangas
2023-10-21  7:19                                     ` Eli Zaretskii
2023-10-21  7:35                                       ` Andreas Schwab
2023-10-21  7:45                                         ` Eli Zaretskii
2023-10-21  9:19                                           ` Stefan Kangas
2024-01-10 21:21                                       ` Stefan Kangas
2024-01-11 12:07                                         ` Ihor Radchenko
2024-01-11 14:34                                           ` Max Nikulin
2024-01-11 15:07                                             ` Ihor Radchenko
2024-01-11 15:28                                               ` Eli Zaretskii
2024-01-11 15:37                                                 ` Ihor Radchenko
2023-10-09  2:36                     ` Richard Stallman
2023-10-09 11:04                       ` Eli Zaretskii
2023-10-10 11:56                         ` Richard Stallman
2023-10-11 10:56                           ` Max Nikulin
2023-10-08  3:42                 ` Maxim Nikulin
2023-10-08  5:20                   ` Eli Zaretskii

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