Hitachi Vantara Pentaho Business Analytics Server prior to versions 9.4.0.1 and 9.3.0.2, including 8.3.x is
vulnerable to an authentication bypass (CVE-2022-43939) and a Server Side Template Injection (SSTI) vulnerability
(CVE-2022-43769) that can be chained together to achieve unauthenticated code execution as the user
running the Pentaho Business Analytics Server.
The first vulnerability (CVE-2022-43939) is an authentication bypass which stems from a regex that allows any
URL that ends in "/", followed by "require", optionally "-js" or "-cfg", any character, and then the string
"js" followed optionally by "?" and then any characters of the attacker's choice.
The second (CVE-2022-43769) is a server side
template injection. This vulnerability allows RCE by making a GET request to /api/ldap/config/ldapTreeNodeChildren and
setting the url parameter to ThymeLeaf template code. By abusing the ability to execute arbitrary Java classes within
Thymeleaf templates, an attacker can execute arbitrary commands as the user running the Pentaho Business Analytics Server.
msf > use exploit/multi/http/pentaho_business_server_authbypass_and_ssti
msf exploit(pentaho_business_server_authbypass_and_ssti) > show targets
...targets...
msf exploit(pentaho_business_server_authbypass_and_ssti) > set TARGET < target-id >
msf exploit(pentaho_business_server_authbypass_and_ssti) > show options
...show and set options...
msf exploit(pentaho_business_server_authbypass_and_ssti) > exploit
Vulmon