XL-19-009 - ABB HMI Hardcoded Credentials Vulnerability
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Identifiers
-----------
XL-19-009
CVE-2019-7225
ABBVU-IAMF-1902004
ABBVU-IAMF-1902011
ABBVU-IAMF-1902002


CVSS Score
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8.8 (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)


Affected vendor
---------------
ABB (new.abb.com)


Credit
------
xen1thLabs - Software Labs


Vulnerability summary
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The affected ABB components implement hidden administrative accounts used during the provisioning phase of the HMI interface. These credentials allow the provisioning tool "Panel Builder 600" to flash a new interface and Tags (MODBUS coils) mapping to the HMI.

These identified credentials are:

IdalMaster : idal123
exor : exor
The credentials are sent over both HTTP(S) and FTP. There is no option to disable or change these undocumented credentials.


Technical details
-----------------
An attacker can use these credentials to login to any ABB HMI type CP635 to read/write HMI configuration files and reset the device. Combining these actions can push malicious configuration and HMI code to the device.


Affected systems
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CP620, order code: 1SAP520100R0001, revision index G1 with BSP UN31 V1.76 and prior
CP620, order code: 1SAP520100R4001, revision index G1 with BSP UN31 V1.76 and prior
CP620-WEB, order code: 1SAP520200R0001, revision index G1 with BSP UN31 V1.76 and prior
CP630, order code: 1SAP530100R0001, revision index G1 with BSP UN31 V1.76 and prior
CP630-WEB, order code: 1SAP530200R0001, revision index G1 with BSP UN31 V1.76 and prior
CP635, order code: 1SAP535100R0001, revision index G1 with BSP UN31 V1.76 and prior
CP635, order code: 1SAP535100R5001, revision index G1 with BSP UN31 V1.76 and prior
CP635-B, order code: 1SAP535100R2001, revision index G1 with BSP UN31 V1.76 and prior
CP635-WEB, order code: 1SAP535200R0001, revision index G1 with BSP UN31 V1.76 and prior
PB610 Panel Builder 600, order code: 1SAP500900R0101, versions 1.91 ... 2.8.0.3674CP651, order code: 1SAP551100R0001, revision index B1 with BSPUN30 V1.76 and prior
CP651-WEB, order code: 1SAP551200R0001, revision index A0 with BSP UN30 V1.76 and prior
CP661, order code: 1SAP561100R0001, revision index B1 with BSP UN30 V1.76 and prior
CP661-WEB, order code: 1SAP561200R0001, revision index A0 with BSP UN30 V1.76 and prior
CP665, order code: 1SAP565100R0001, revision index B1 with BSP UN30 V1.76 and prior
CP665-WEB, order code: 1SAP565200R0001, revision index A0 with BSP UN30 V1.76 and prior
CP676, order code: 1SAP576100R0001, revision index B1 with BSP UN30 V1.76 and prior
CP676-WEB, order code: 1SAP576200R0001, revision index A0 with BSP UN30 V1.76 and prior


Solution
--------
Apply the patches or changes recommended by the vendor in their vulnerability advisories:
  - ABB CP635 HMI - https://search.abb.com/library/Download.aspx?DocumentID=3ADR010376&LanguageCode=en&DocumentPartId=&Action=Launch
  - ABB PB610 - https://search.abb.com/library/Download.aspx?DocumentID=3ADR010377&LanguageCode=en&DocumentPartId=&Action=Launch
  - ABB CP651 HMI - https://search.abb.com/library/Download.aspx?DocumentID=3ADR010402&LanguageCode=en&DocumentPartId=&Action=Launch

Disclosure timeline
-------------------
04/02/2019 - Contacted ABB requesting disclosure coordination
05/02/2019 - Provided vulnerability details
05/06/2019 - Patch available
17/06/2019 - xen1thLabs public disclosure