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Web Applications, 6-1 Web Server Framework

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Print Controller Design Guide for Information Security 2-6 Web Applications 2-6-1 Web Server Framework The MFP/LP Web Server was developed exclusively by Ricoh, Co. Ltd. Encrypted Communication Support The Web server installed on the MFP/LP supports SSL communication. Since the MFP/LP is accessed via an HTTPS connection, all input/output data is encrypted (incl. authentication ID, password, cookie). This allows for safe and secure communication between WebImageMonitor and the MFP/LP. It is possible to set the MFP/LP so that it will reject HTTP-based communication, which does not encrypt the data mentioned above, such that it will only accept HTTPS-based communication. User Authentication Support WebImageMonitor supports the access control functions described above in "Authentication/Access Control". These functions provide greater security by prohibiting unauthenticated users from changing any settings as well as limiting the number of items that can be viewed. Protection Against Cross-site Scripting (XSS) "Cross-site scripting" (XXS) is a security threat that refers to the intentional introduction of malicious script into data stored on a Web server, with the intent to cause damage or loss as a result of a valid user accessing the Web content associated with that server. Potential damage from XXS includes such common security threats as: - User information is accessed, such as data stored in cookies - Files stored on the PC are accessed or destroyed - URL redirection to malicious Web sites As mentioned above, authentication is required before any changes to the MFP/LP settings can be made from WebImageMonitor. This ensures that users without valid accounts are not able to introduce script containing malicious data. The MFP/LP sanitizes all HTML data that is sent from an MFP/LP Web application to WebImageMonitor. One of the strongest known countermeasures against cross-site scripting, data sanitizing deletes or neutralizes selected character strings designed to function as HTML tags or script. Page 69 of 86

Section	Page
04/23/2010	1
For these details, please refer to the Operating Instructions for the specific machine in question.	6
Hardware Configuration	7
MFP	7
LP	9
TPM (Trusted Platform Module): When the MFP/LP main power is turned on, this security module (chip) performs a verification on the validity of the software installed on the hardware platform, which includes checking for any illegal alterations.	10
Shared Service Layers	11
Principal Machine Functions	12
Data Security	14
External I/F	14
Protection of Program Data from Illegal Access via an External Device	14
IC card-based authentication functions: Authentication is mutual and encrypted, which prevents impersonation and ensures that data is properly protected.	16
Firmware Installation/Update	17
Remote Firmware Installation via Web SmartDeviceMonitor Professional IS (performed by the end user)	19
Verification of Firmware/Program Validity	20
Note: Produced by STMicroelectronics, TPM is a product of the ST19WP18 family, which has earned Common Criteria certification (EAL5+).	20
Authentication	21
IC Card Authentication	24
Access Control	25
In addition, it is possible to create an access control list (ACL) for each individual Address Book entry and Document Server document at both the individual user and group levels.	25
If the MLP/LP is initialized in this way, all of the user information, document data, and settings stored in the MLP/LP since installation will be initialized (erased).	26
Data Erase/Overwrite	27
To execute the overwrite, the operator can choose from two options: \	28
The execution of this feature does not clear engine-related information such as the value of the total counter, or engine-related adjustment settings contained in SP mode and UP mode.	28
Through this arrangement, the copy of the HDD storage key is automatically decrypted once the Encryption Key Restore has been completed.	31
Document Server Documents (MFP models only)	33
Access Privileges and Operations for Stored Documents	34
Without HDD: 500 entries	38
Overview of Capture Operations	39
Operations that Generate Captured Images	39
Capture Settings	41
Security Considerations	42
Captured Documents and Log Data	42
Additional Methods for Increased Security	42
(Authentication not required)	42
Copier (MFP Models Only)	43
Overview of Copier Operations	43
Data Security Considerations	43
Protection of Copy Jobs in Progress	43
Protection of Document Server Documents	43
Refer to 1.7.2 Document Server Documents (MFP models only) for details on the Document Lock feature.	44
Restricting the Available Functions for Each Individual User	45
Job/Access Log Data Collection	45
Print Backup	45
(printing out, editing, copying).	46
Overview of Printer Operations	47
Data Flow	47
Data Security Considerations	51
The \	53
Overview of Scanner Operations	54
Data Flow Security Considerations	54
Protection of Data when Performing Scanning and Sending Operations	55
Protection of Document Server Documents	56
Protection of Sending Results and Status Information	57
Protection of the Scanner Features Settings	57
Data Stored in the Job Log	58
Terminology	58
FTP (File Transfer Protocol): A protocol used when transferring files over a TCP/IP network.	58
Overview of FAX operations	59
Data Security Considerations	60
Protection of the Journal and Documents in Document Server Storage	61
Protection of FAX Transmission Operations	61
Protection of FAX Features Settings	62
The \	62
Job Log	62
Protection of Internet FAX Transmissions using S/MIME	62
Preventing FAX Transmission to Unintended Destination(s)	63
This prevents a FAX from being sent to an unintended destination when, for example, the operator accidentally touches an additional Quick Dial key.	63
Overview of NetFile Operations	64
Data Flow	65
Supplementary	65
Network Topology for a System Using Integration Server Authentication (Sample)	66
As long as the track ID is not stolen from the communication path between the PC and MFP/LP (which can be protected against by enabling SSL encryption) or from the PC itself, it is impossible to perform any unauthorized operations on these print jobs	68
Web Server Framework	69
WebDocBox (MFP models only)	70
For more details on job and access logs, please refer to 1.9 Job/Access Logs.	72
@Remote	73
Overview of @Remote Operations	73
Data Security Considerations	73
Security is increased even further by the fact that the symmetric key used is not a static key, but rather one that is generated every time a new session is initiated.	73
Overview of Copy Data Security Operations	74
Data Flow	75
Following this, an entry for the event itself is stored in the access log, along with the username.	75
Overview of Operations	77
1	77
Overview of SDK Application Functions	79
3: DSDK Œ MFP/LP Hardware Configuration	79
Scanning Functions: Sending Data Over the Network with the Copier and Scanner (MFP models only)	80
FAX Functions (MFP models only)	80
Network Functions	81
Printer Functions	81
Machine Administrative Functions (MFP models only)	81
Authentication Functions	81
Data Security Considerations	83
Preventing the Installation of Illegal Applications	83
Authentication of SDK Applications at Installation	83
Prevention of Access to Address Book Data and Machine Management Data	85
Protection Against Attacks on Principal MFP/LP Functions, Prevention of Damage to the System	85
Protection Against Attacks from External Sources	85

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Print Controller Design Guide for Information Security

Page 69 of 86

2-6

Web Applications

2-6-1 Web Server Framework

The MFP/LP Web Server was developed exclusively by Ricoh, Co. Ltd.

Encrypted Communication Support

The Web server installed on the MFP/LP supports SSL communication. Since the MFP/LP is accessed

via an HTTPS connection, all input/output data is encrypted (incl. authentication ID, password, cookie).

This allows for safe and secure communication between WebImageMonitor and the MFP/LP. It is

possible to set the MFP/LP so that it will reject HTTP-based communication, which does not encrypt

the data mentioned above, such that it will only accept HTTPS-based communication.

User Authentication Support

WebImageMonitor supports the access control functions described above in “Authentication/Access

Control”. These functions provide greater security by prohibiting unauthenticated users from changing

any settings as well as limiting the number of items that can be viewed.

Protection Against Cross-site Scripting (XSS)

“Cross-site scripting” (XXS) is a security threat that refers to the intentional introduction of malicious

script into data stored on a Web server, with the intent to cause damage or loss as a result of a valid

user accessing the Web content associated with that server. Potential damage from XXS includes

such common security threats as:

User information is accessed, such as data stored in cookies

Files stored on the PC are accessed or destroyed

URL redirection to malicious Web sites

As mentioned above, authentication is required before any changes to the MFP/LP settings can be

made from WebImageMonitor. This ensures that users without valid accounts are not able to introduce

script containing malicious data.

The MFP/LP sanitizes all HTML data that is sent from an MFP/LP Web application to

WebImageMonitor. One of the strongest known countermeasures against cross-site scripting, data

sanitizing deletes or neutralizes selected character strings designed to function as HTML tags or

script.