Web Browsers White Papers
Dynamic Pharming Attacks and Locked Same-Origin Policies for Web Browsers
Overview This paper describes a new attack against web authentication, which the paper calls dynamic pharming. Dynamic pharming works by hijacking DNS and sending the victim's browser malicious Javascript, which then exploits DNS rebinding vulnerabilities and the name-based same-origin policy to hijack a legitimate session after authentication has taken place. As a result, the attack works regardless of the authentication scheme used. Dynamic pharming enables the adversary to eavesdrop on sensitive content, forge transactions, sniff secondary passwords, etc. To counter dynamic pharming attacks, the paper proposes two locked same-origin policies for web browsers. In contrast to the legacy same-origin policy, which regulates cross-object access control in browsers using domain names, the locked same-origin policies enforce access using servers' X.509 certificates and public keys.
| Publisher | Association for Computing Machinery | File Format | |
|---|---|---|---|
| Date Published | November 2007 | ||
| Format | White Papers | ||
| Topics | |||
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