CWE

Use of Less Trusted Source

ID: 348		Date: (C)2012-05-14   (M)2022-10-10
Type: weakness		Status: DRAFT
Abstraction Type: Base

Description

The software has two different sources of the same data or information, but it uses the source that has less support for verification, is less trusted, or is less resistant to attack.

Applicable Platforms
Language Class: All

Time Of Introduction

• Architecture and Design
• Implementation

Related Attack Patterns

• CAPEC-141
• CAPEC-142
• CAPEC-18
• CAPEC-63
• CAPEC-73
• CAPEC-76
• CAPEC-85
• CAPEC-86

Common Consequences

Scope	Technical Impact	Notes
Access_Control	Bypass protection mechanism Gain privileges / assume identity	An attacker could utilize the untrusted data source to bypass protection mechanisms and gain access to sensitive data.

Detection Methods
None

Potential Mitigations
None

Relationships

Related CWE	Type	View	Chain
CWE-348 ChildOf CWE-907	Category	CWE-888

Demonstrative Examples   (Details)

1. This code attempts to limit the access of a page to certain IP Addresses. It checks the 'HTTP_X_FORWARDED_FOR' header in case an authorized user is sending the request through a proxy.

Observed Examples

1. CVE-2001-0860 : Product uses IP address provided by a client, instead of obtaining it from the packet headers, allowing easier spoofing.
2. CVE-2004-1950 : Web product uses the IP address in the X-Forwarded-For HTTP header instead of a server variable that uses the connecting IP address, allowing filter bypass.
3. BID:15326 : Similar to CVE-2004-1950
4. CVE-2001-0908 : Product logs IP address specified by the client instead of obtaining it from the packet headers, allowing information hiding.
5. CVE-2006-1126 : PHP application uses IP address from X-Forwarded-For HTTP header, instead of REMOTE_ADDR.

For more examples, refer to CVE relations in the bottom box.

White Box Definitions
None

Black Box Definitions
None

Taxynomy Mappings

Taxynomy	Id	Name	Fit
PLOVER		Use of Less Trusted Source

References:
None