this post was submitted on 29 Jun 2023
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Found the error Not allowed to load local resource: file:///etc/passwd while looking at infosec.pub's communities page. There's a community called "ignore me" that adds a few image tags trying to steal your passwd file.

You have to be extremely poorly configured for this to work, but the red flags you see should keep you on your toes for the red flags you don't.

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[–] farthom@lemmy.ca 6 points 1 year ago (10 children)

Holy shit this is kind of unsettling. Though I would expect ALL major browsers to reject reading any local files like this..... would this kind of thing actually succeed somewhere/somehow?

[–] Rooster@infosec.pub 3 points 1 year ago (9 children)

If you ran your browser as root and configured your browser to load local resources on non-local domains maybe. I think you can do that in chrome://flags but you have to explicitly list the domains allowed to do it.

I'm hoping this is just a bad joke.

[–] fox@vlemmy.net 1 points 1 year ago (2 children)

you don't need to be root to read /etc/passwd

[–] trachemys@iusearchlinux.fyi 6 points 1 year ago

That’s because passwd doesn’t store the password hashes. Just user names.

[–] Greg@lemmy.ca 3 points 1 year ago* (last edited 1 year ago) (2 children)

Are you sure? What do you get when you run $ cat /etc/passwd in terminal? Just paste the results here 😇

Edit: to anyone reading this on the future, don't actually do this, it was a joke

[–] fox@vlemmy.net 7 points 1 year ago (1 children)

yup pretty sure

$ cat /etc/passwd
fox:hunter2:1000:1000::/home/fox:/usr/bin/zsh

😉

[–] animist@lemmy.one 5 points 1 year ago

Weird, all I see is *******

[–] delial@lemmy.sdf.org 1 points 1 year ago* (last edited 1 year ago)

Since you told me not to. There isn't a risk on most linux systems; passwords were moved to /etc/shadow a long time ago. It only leaks the names of your users and largely useless info for most attackers:

root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
irc:x:39:39:ircd:/run/ircd:/usr/sbin/nologin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
_apt:x:100:65534::/nonexistent:/usr/sbin/nologin
systemd-network:x:101:102:systemd Network Management,,,:/run/systemd:/usr/sbin/nologin
systemd-resolve:x:102:103:systemd Resolver,,,:/run/systemd:/usr/sbin/nologin
messagebus:x:999:999:System Message Bus:/:/usr/sbin/nologin
systemd-timesync:x:998:998:systemd Time Synchronization:/:/usr/sbin/nologin
systemd-coredump:x:997:997:systemd Core Dumper:/:/usr/sbin/nologin
delial:x:1000:1000:,,,:/home/delial:/bin/bash
sshd:x:103:65534::/run/sshd:/usr/sbin/nologin
xrdp:x:104:110::/run/xrdp:/usr/sbin/nologin
dictd:x:105:111:Dictd Server,,,:/var/lib/dictd:/usr/sbin/nologin
nm-openvpn:x:106:112:NetworkManager OpenVPN,,,:/var/lib/openvpn/chroot:/usr/sbin/nologin
sssd:x:107:113:SSSD system user,,,:/var/lib/sss:/usr/sbin/nologin
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