Reports `Inside Container ........ No` inside of LXD container (Proxmox 8)

[coolaj86]

Is this only for Docker at this time? Or is vanilla LXD supported too? If so, any idea why it would think it's not in a container when it is?

cat /etc/issue

Ubuntu 24.04 LTS \n \l

uname -a

Linux deepce-example-1 6.8.12-8-pve #1 SMP PREEMPT_DYNAMIC PMX 6.8.12-8 (2025-01-24T12:32Z) x86_64 x86_64 x86_64 GNU/Linux

curl -sL https://github.com/stealthcopter/deepce/raw/main/deepce.sh -o ./deepce.sh
chmod a+x ./deepce.sh
./deepce.sh

                      ##         .
                ## ## ##        ==
             ## ## ## ##       ===
         /"""""""""""""""""\___/ ===
    ~~~ {~~ ~~~~ ~~~ ~~~~ ~~~ ~ /  ===- ~~~
         \______ X           __/
           \    \         __/
            \____\_______/
          __
     ____/ /__  ___  ____  ________
    / __  / _ \/ _ \/ __ \/ ___/ _ \   ENUMERATE
   / /_/ /  __/  __/ /_/ / (__/  __/  ESCALATE
   \__,_/\___/\___/ .___/\___/\___/  ESCAPE
                 /_/

 Docker Enumeration, Escalation of Privileges and Container Escapes (DEEPCE)
 by stealthcopter

==========================================( Colors )==========================================
[+] Exploit Test ............ Exploitable - Check this out
[+] Basic Test .............. Positive Result
[+] Another Test ............ Error running check
[+] Negative Test ........... No
[+] Multi line test ......... Yes
Command output
spanning multiple lines

Tips will look like this and often contains links with additional info. You can usually
ctrl+click links in modern terminal to open in a browser window
See https://stealthcopter.github.io/deepce

===================================( Enumerating Platform )===================================
[+] Inside Container ........ No
[+] User .................... app
[+] Groups .................. app sudo users
[+] Sudo .................... Matching Defaults entries for app on deepce-example-1:
    env_reset, mail_badpass,
    secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin,
    use_pty

User app may run the following commands on deepce-example-1:
    (ALL : ALL) ALL
    (ALL : ALL) NOPASSWD: ALL
Passwordless Sudo
[+] Container tools ......... None
[+] Docker Executable ....... Not Found
[+] Docker Sock ............. Not Found
[+] Docker Version .......... Version Unknown
==================================( Enumerating Containers )==================================
==============================================================================================

[coolaj86]

Poking around in the script, I found where inContainer is set, and I looked up some other detection suggestions as well.

Here's what I get:

cat /proc/1/cgroup
0::/init.scope

cat /proc/self/cgroup
0::/user.slice/user-1000.slice/session-17795.scope

cat /proc/self/mountinfo | grep lxc
2474 2461 0:43 /proc/cpuinfo /proc/cpuinfo rw,nosuid,nodev,relatime shared:859 master:52 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other
2475 2461 0:43 /proc/diskstats /proc/diskstats rw,nosuid,nodev,relatime shared:860 master:52 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other
2476 2461 0:43 /proc/loadavg /proc/loadavg rw,nosuid,nodev,relatime shared:861 master:52 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other
2477 2461 0:43 /proc/meminfo /proc/meminfo rw,nosuid,nodev,relatime shared:862 master:52 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other
2478 2461 0:43 /proc/slabinfo /proc/slabinfo rw,nosuid,nodev,relatime shared:863 master:52 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other
2479 2461 0:43 /proc/stat /proc/stat rw,nosuid,nodev,relatime shared:864 master:52 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other
2480 2461 0:43 /proc/swaps /proc/swaps rw,nosuid,nodev,relatime shared:865 master:52 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other
2481 2461 0:43 /proc/uptime /proc/uptime rw,nosuid,nodev,relatime shared:866 master:52 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other
2482 2466 0:43 /sys/devices/system/cpu /sys/devices/system/cpu rw,nosuid,nodev,relatime shared:874 master:52 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other
2744 2463 0:158 /.lxc-boot-id /proc/sys/kernel/random/boot_id ro,nosuid,nodev,noexec,relatime shared:839 - tmpfs none rw,size=492k,mode=755,uid=100000,gid=100000,inode64

The host also has

cat /proc/self/mountinfo | grep lxc
224 29 0:43 / /var/lib/lxcfs rw,nosuid,nodev,relatime shared:81 - fuse.lxcfs lxcfs rw,user_id=0,group_id=0,allow_other