Home > CAPEC List > CAPEC-466: Leveraging Active Man in the Middle Attacks to Bypass Same Origin Policy (Version 3.2)  

CAPEC-466: Leveraging Active Man in the Middle Attacks to Bypass Same Origin Policy

Attack Pattern ID: 466
Abstraction: Standard
Status: Draft
Presentation Filter:
+ Description
An attacker leverages a man in the middle attack in order to bypass the same origin policy protection in the victim's browser. This active man in the middle attack could be launched, for instance, when the victim is connected to a public WIFI hot spot. An attacker is able to intercept requests and responses between the victim's browser and some non-sensitive website that does not use TLS. For instance, the victim may be checking flight or weather information. When an attacker intercepts a response bound to the victim, an attacker adds an iFrame (which is possibly invisible) to the response referencing some domain with sensitive functionality and forwards the response to the victim. The victim's browser than automatically initiates an unauthorized request to the site with sensitive functionality. The same origin policy would prevent making these requests to a site other than the one from which the Java Script came, but the attacker once again uses active man in the middle to intercept these automatic requests and redirect them to the domain / service with sensitive functionality. Any persistent cookies that the victim has in his or her browser would be used for these unauthorized requests. The attacker thus actively directs the victim to a site with sensitive functionality. When the site with sensitive functionality responds back to the victim's request, an active man in the middle attacker intercepts these responses, injects his or her own malicious Java Script into these responses, and forwards to the victim's browser. In the victim's browser, that Java Script executes under the restrictions of the site with sensitive functionality and can essentially be used to continue to interact with the sensitive site. So an attacker can execute scripts within the victim's browser on any domains the attacker desires. The attacker is able to use this technique to steal cookies from the victim's browser for whatever site the attacker wants. This applies to both persistent cookies and HTTP only cookies (unlike traditional XSS attacks). An attacker is also able to use this technique to steal authentication credentials for sites that only encrypt the login form, but do not require a secure channel for the initial request to get to the page with the login form. Further the attacker is also able to steal any autocompletion information. This attack pattern can also be used to enable session fixation and cache poisoning attacks. Additional attacks can be enabled as well.
+ Typical Severity


+ Relationships

The table below shows the other attack patterns and high level categories that are related to this attack pattern. These relationships are defined as ChildOf and ParentOf, and give insight to similar items that may exist at higher and lower levels of abstraction. In addition, relationships such as CanFollow, PeerOf, and CanAlsoBe are defined to show similar attack patterns that the user may want to explore.

ChildOfMeta Attack PatternMeta Attack Pattern - A meta level attack pattern in CAPEC is a decidedly abstract characterization of a specific methodology or technique used in an attack. A meta attack pattern is often void of a specific technology or implementation and is meant to provide an understanding of a high level approach. A meta level attack pattern is a generalization of related group of standard level attack patterns. Meta level attack patterns are particularly useful for architecture and design level threat modeling exercises.94Man in the Middle Attack

The table below shows the views that this attack pattern belongs to and top level categories within that view.

+ Prerequisites
The victim and the attacker are both in an environment where an active man in the middle attack is possible (e.g., public WIFI hot spot)The victim visits at least one website that does not use TLS / SSL
+ Skills Required
[Level: Low]
Ability to intercept and modify requests / responses
[Level: Medium]
Ability to create iFrame and JavaScript code that would initiate unauthorized requests to sensitive sites from the victim's browser
[Level: Medium]
Solid understanding of the HTTP protocol
+ Mitigations

Design: Tunnel communications through a secure proxy

Design: Trust level separation for privileged / non privileged interactions (e.g., two different browsers, two different users, two different operating systems, two different virtual machines)

+ References
[REF-403] Roi Saltzman and Adi Sharabani. "Active Man in the Middle Attacks". IBM Rational Application Security Group. 2009-02-02. <http://blog.watchfire.com/wfblog/2009/02/active-man-in-the-middle-attacks.html>.
+ Content History
Submission DateSubmitterOrganization
2014-06-23CAPEC Content TeamThe MITRE Corporation
Modification DateModifierOrganization
2019-09-30CAPEC Content TeamThe MITRE Corporation
Updated @Abstraction
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Page Last Updated or Reviewed: September 30, 2019