CVE-2020-11932 🐛🔍

Controlla la CVE-2020-11932 e verifica la presenza di host relativi a questa vulnerabilità

Utilizzo

Scaricamento

git clone https://github.com/Staubgeborener/CVE-2020-11932
cd CVE-2020-11932
chmod +x cve-2020-11932.sh
./cve-2020-11932.sh

Con curl (quindi senza scaricare)

bash <(curl -s https://raw.githubusercontent.com/Staubgeborener/CVE-2020-11932/master/cve-2020-11932.sh)

Spiegazione

Questa è una sorta di prova di concetto della vulnerabilità CVE-2020-11932. È possibile che Ubuntu Server registri la password della crittografia completa del disco LUKS in testo semplice. Questo è stato testato su Ubuntu Server 20.04.

Creata crittografia LUKS (LVM) con password T0pS3cr3tP4ssw0rd. Possiamo trovare cinque file che contengono la password in testo semplice sudo grep -Rl "T0pS3cr3tP4ssw0rd" /:

subiquity-curtin-install.conf
curtin-install-cfg.yaml
curtin-install.log
installer-journal.txt
autoinstall-user-data

user@encryptiontest:~$ sudo grep -Rl "T0pS3cr3tP4ssw0rd" /
/var/log/installer/subiquity-curtin-install.conf 
/var/log/installer/curtin-install-cfg.yaml 
/var/log/installer/curtin-install.log 
/var/log/installer/installer-journal.txt 
/var/log/installer/autoinstall-user-data

user@encryptiontest:~$ grep "T0pS3cr3tP4ssw0rd" /var/log/installer/subiquity-curtin-install.conf
- {volume: partition-2, key: T0pS3cr3tP4ssw0rd, preserve: false, type: dm_crypt,

user@encryptiontest:~$ sudo grep T0pS3cr3tP4ssw0rd /var/log/installer/curtin-install-cfg.yaml 
[sudo] password for user: 
key: T0pS3cr3tP4ssw0rd

user@encryptiontest:~$ sudo grep "T0pS3cr3tP4ssw0rd" /var/log/installer/curtin-install.log 
get_path_to_storage_volume for volume dm_crypt-0({'volumel: 'partition-2', 'key': T0pS3cr3tP4ssw0rd, 'preserve': False, 'type': 'dm_crypt', 'id': 'dm_crypt-0'})

user@encryptiontest:~$ sudo grep -o "T0pS3cr3tP4ssw0rd" /var/log/installer/installer-journal.txt 
T0pS3cr3tP4ssw0rd 
T0pS3cr3tP4ssw0rd

user@encryptiontest:~$ sudo grep T0pS3cr3tP4ssw0rd /var/log/installer/autoinstall-user-data
- {volume: partition-2, key: T0pS3cr3tP4ssw0rd, preserve: false, type: dm_crypt,

root@encryptiontest:/home/user# ./CVE-2020-11932.sh 
Checking subiquity-curtin-install.conf: 
volume: partition-2, key: T0pS3cr3tP4ssw0rd, preserve: false, type: dm_crypt

⇒ Dopo aver eseguito cve-2020-11932.sh otterrai un output simile a questo:

Checking curtin-install-cfg.yaml: 
key: T0pS3cr3tP4ssw0rd 

Checking curtin-install.log: 
get_path_to_storage_volume for volume dm_crypt-0({'volume': 'partition-2', 'key': 'T0pS3cr3tP4ssw0rd', 'preserve': False, 'type': 'dm_crypt', 'id': 'dm_crypt-01'}) 

Checking installer-journal.txt: 
'T0pS3cr3tP4ssw0rd', 'preserve': False, 'type': 'dm_crypt', 'id': 'dm_crypt-0'}, {'name': 'ubuntu-vg', 'devices': ['dm_crypt-0'], 'preserve': False, 'type': 'lvm_volgroup', 'id': lvm_volgroup-0', 'name': 'ubuntu-lv', 'volgroup': lvm_volgroup-0', 'size': '42949672966', 'preserve': False, 'type': 'lvm_partition', 'id': lvm_partition-01, {'fstype': 'ext4', 'volume': lvm_partition-0' 
'T0pS3cr3tP4ssw0rd' 

Checking autoinstall-user-data: 
{volume: partition-2, key: T0pS3cr3tP4ssw0rd, preserve: false, type: dm_crypt 

CVE-2020-11932 vulnerability on this Ubuntu Release: 20.04 ! 

Found: key1: T0pS3cr3tP4ssw0rd 
key2: T0pS3cr3tP4ssw0rd 
key3: get_path_to_storage_volume for volume dm_crypt-0({'volumel: 'partition-2', 'key': 'T0pS3cr3tP4ssw0rd', 'preserve': False, 'type': 'dm_crypt', 'id': 'dm_crypt-0'})
key4: T0pS3cr3tP4ssw0rd 
T0pS3cr3tP4ssw0rd 
key5: T0pS3cr3tP4ssw0rd

Licenza

Questo progetto è concesso in licenza sotto la licenza MIT. Dai un'occhiata al file di licenza per maggiori informazioni.

CVE-2020-11932