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  • Wi-Fi HTTP Request Hijacking attack against iOS users

Wi-Fi HTTP Request Hijacking attack against iOS users

Pierluigi Paganini October 30, 2013

Wi-Fi HTTP Request Hijacking attack against iOS – the researchers at Skycure have demonstrated a new technique that menaces mobile users.

I’m not surprised for trust given by Internet users to public Wi-Fi networks that are notoriously insecure, wrong habits on the open networks could expose our identity to serious risks, one on all the identity theft.

Mobile security researchers at Skycure have discovered a new technique, HTTP Request Hijacking, exploitable by an attacker to access mobile phone apps from Wi-Fi networks, in particulate he could exploits a vulnerability in the code within iOS apps.

The attacker is able to modify the server URL from which a mobile application loads its data, in the attack scenario the app instead load data from its legitimate server could load it from a server controlled by the attacker without the victim note it. The data acquired from a server controlled by the attacker could be exploited to load malicious links, or insert fake, market-moving news into a news app.

HTTP request Hijacking

The researchers at Skycure have decided to public disclose the methods HTTP Request Hijacking to exploit the vulnerability because it is present in hundreds of apps they tested, including stock management apps  and news apps.

“The problem essentially revolves around the impact of HTTP redirections caching in mobile applications.
Many iOS applications cache HTTP status code 301 when received over the network as a response. While the 301 Moved Permanently HTTP response has valuable uses, it also has severe security ramifications on mobile apps, as it could allow a malicious attacker to persistently alter and remotely control the way the application functions, without any reasonable way for the victim to know about it. Whereas browsers have an address bar, most mobile apps do not visually indicate the server they connect to, making HTTP Request Hijacking attacks seamless, with very low probability of being identified by the victims.
HTTP Request Hijacking attacks start with a Man-in-the-middle scenario. When the vulnerable app sends a request to its designated server (e.g., http://www.real.site/resource), the attacker captures it and returns a 301 HTTP redirection to an attacker-controlled server (e.g., http://www.attacker.site/resource).” The 301 HTTP redirection issued by the attacker is therefore kept in the app’s cache, changing the original code’s behavior from then on. Instead of retrieving data from http://www.real.site, the app now loads data fromhttp://www.attacker.site, even after the MiTM attack is over and the attacker is long gone.

In the HTTP Request Hijacking attack scenario a victim connects to the Wi-Fi in a public place and uses his favorite apps as usual. An attacker is in the immediate vicinity and performs a silent HRH attack on her apps. The next day, he uses again the app at office, but the data he received are not the legitimate one, for example he logged in to reads the news, but he accessed to the attacker’s news!

The mobile experts avoided making public the name of the apps vulnerable to avoid that hackers could exploit it.

“The vulnerability affects so many apps that it’s virtually impossible to alert app makers,” said Yair Amit, Skycure’s chief technology officer.

The researchers provided a video prof for the attack, demonstrating how to manipulate the app, exploiting the 301 directive it is possible to hijack the traffic flow from the vulnerable app to the attackers’ server.

 

On Tuesday, Skycure researchers will demonstrate how a simple vulnerability allows attackers to permanently manipulate iOS apps.

The Skycure researchers demonstrated last year a flaw in the way LinkedIn was managing members’ calendar entries on iPhones and iPads, including details about meeting data, dial-in information and credentials.

I suggest a carefully the reading of the post especially for detailed remediation against HTTP Request Hijacking attacks proposed to developers, iOS users and CISO.

Pierluigi Paganini

(Security Affairs – HTTP Request Hijacking , mobile, security)


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