File 0603-erts-Add-warning-on-BadBatBut-attack-to-op... of Package erlang

Overview Repositories Revisions Requests Users Attributes Meta

File 0603-erts-Add-warning-on-BadBatBut-attack-to-open_port-2-.patch of Package erlang (Revision 892e7dc5e084bd8d8059892726ddebb4)

Currently displaying revision 892e7dc5e084bd8d8059892726ddebb4 , Show latest

From 00fade0a860242a1abe806758471508d6571840f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20H=C3=B6gberg?= <john@erlang.org>
Date: Tue, 16 Apr 2024 13:04:45 +0200
Subject: [PATCH] erts: Add warning on BadBatBut attack to open_port/2
 documentation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-authored-by: José Valim <jose.valim@dashbit.co>
---
 erts/doc/src/erlang.xml | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)

diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index 58be93f0f0..0f2da9fe3b 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -5278,13 +5278,22 @@ receive_replies(ReqId, N, Acc) ->
 programs with spaces in filenames or directory names.
 If spaces in executable filenames are desired, use
 <c>{spawn_executable, <anno>Command</anno>}</c> instead.
- </item>
- <tag><c>{spawn_driver, <anno>Command</anno>}</c></tag>
- <item>
- Works like <c>{spawn, <anno>Command</anno>}</c>, but demands
- the first (space-separated) token of the command to be the name
- of a loaded driver. If no driver with that name is loaded, a
- <c>badarg</c> error is raised.
+ <warning>
+ On Unix systems, arguments are passed to a new operating
+ system process as an array of strings but on Windows it is up
+ to the child process to parse them and some Windows programs
+ may apply their own rules, which are inconsistent with the
+ standard C runtime <c>argv</c> parsing.
+ This is particularly troublesome when invoking <c>.bat</c>,
+ <c>.cmd</c>, or <c>.com</c> files as these run implicitly
+ through <c>cmd.exe</c>, whose argument parsing is vulnerable to
+ malicious input and can be used to run arbitrary shell
+ commands.
+ Therefore, if you are running on Windows and you execute batch
+ files or <c>.com</c> applications, you must not pass untrusted
+ input as arguments to the program.
+ This affects both <c>spawn</c> and <c>spawn_executable</c>.
+ </warning>
 </item>
 <tag><c>{spawn_executable, <anno>FileName</anno>}</c></tag>
 <item>
@@ -5312,6 +5321,13 @@ receive_replies(ReqId, N, Acc) ->
 <c>eacces</c> is raised when the specified file is not
 executable.
 </item>
+ <tag><c>{spawn_driver, <anno>Command</anno>}</c></tag>
+ <item>
+ Works like <c>{spawn, <anno>Command</anno>}</c>, but demands
+ the first (space-separated) token of the command to be the name
+ of a loaded driver. If no driver with that name is loaded, a
+ <c>badarg</c> error is raised.
+ </item>
 <tag><c>{fd, <anno>In</anno>, <anno>Out</anno>}</c></tag>
 <item>
 Allows an Erlang process to access any currently opened
-- 
2.35.3

Places

File 0603-erts-Add-warning-on-BadBatBut-attack-to-open_port-2-.patch of Package erlang (Revision 892e7dc5e084bd8d8059892726ddebb4)

Places