Parches de seguridad retroportados para versiones no compatibles de Salt

Los parches en este repositorio abordan los siguientes CVEs:

CVE-2020-11651 & CVE-2020-11652 - https://labs.f-secure.com/advisories/saltstack-authorization-bypass

Además, incluyen las siguientes correcciones de errores:

corrección de error tipográfico _minion_runner -> minion_runner. Ver: https://docs.saltstack.com/en/latest/topics/releases/3000.2.html#known-issue
corrección de tipo _find_file_and_stat -> _find_hash_and_stat. Ver https://github.com/rossengeorgiev/salt-security-backports/issues/1
eliminación de run_func de la lista blanca
falta import salt.utils.verify

Las correcciones anteriores están incluidas en la última versión de SaltStack, específicamente v2019.2.5 y v3000.3.

Comprobar si tu salt-master es vulnerable

El script de verificación debe ejecutarse localmente en tu salt-master como root

python salt-cve-check.py

Ejemplo de salida para Salt 2017.7.8:

[+] Salt version: 2017.7.8
[ ] This version of salt is vulnerable! Check results below
[+] Checking salt-master (127.0.0.1:4506) status... ONLINE
[+] Checking if vulnerable to CVE-2020-11651... YES
[+] Checking if vulnerable to CVE-2020-11652 (read_token)... YES
[+] Checking if vulnerable to CVE-2020-11652 (read)... YES
[+] Checking if vulnerable to CVE-2020-11652 (write1)... YES
[+] Checking if vulnerable to CVE-2020-11652 (write2)... YES

Aplicando los parches

# locate the salt package directory (use python3 if necessary)

python -c "import imp; print(imp.find_module('salt')[1])"

# in my case: /usr/lib/python2.7/dist-packages/salt
# apply patches
# (adding -b flag will backup file before modifications at same path with .orig suffix)
# (patch can be reversed running the same command with -R flag)

patch -p2 -d /usr/lib/python2.7/dist-packages/salt < 2017.7.8_CVE-2020-11651.patch
patch -p2 -d /usr/lib/python2.7/dist-packages/salt < 2017.7.8_CVE-2020-11652.patch

# restart salt-master

systemctl restart salt-master
# or
service salt-master restart

Vuelve a ejecutar el script de verificación:

user@salt # python salt-cve-check.py
[+] Salt version: 2017.7.8
[ ] This version of salt is vulnerable! Check results below
[+] Checking salt-master (127.0.0.1:4506) status... ONLINE
[+] Checking if vulnerable to CVE-2020-11651... NO
[+] Checking if vulnerable to CVE-2020-11652 (read_token)... NO
[+] Checking if vulnerable to CVE-2020-11652 (read)... NO
[+] Checking if vulnerable to CVE-2020-11652 (write1)... NO
[+] Checking if vulnerable to CVE-2020-11652 (write2)... NO

salt-security-backports

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Parches de seguridad retroportados para versiones no compatibles de Salt

Comprobar si tu salt-master es vulnerable

Aplicando los parches