White-hat hackers are often accredited with finding serious flaws in online sites and services. David Vieira-Kurz is such a hacker who recently discovered a remote code execution vulnerability in eBay‘s site.
eBay is one of the largest e-retail giants and has a huge online presence. The site is responsible for countless financial transactions every day, being a marketplace of sorts. In view of this, one would expect that its website is highly secure.
However, German security researcher Kurz recently discovered that the site contains a remote code execution vulnerability. The vulnerability essentially allows a hacker to execute a potentially malicious code of his own on eBay’s server, a loophole which allows for a whole range of nefarious activities.
Kurz went on to tinker with the site and inject an arbitrary code of his own in which he was successful. He apparently modified a legitimate URL
Using the above method, many different forms of payloads can be injected into eBay’s server. Essentially, the problem with the eBay server was that it was filtering certain user-supplied strings but neglected appropriate filteration of user-supplied arrays. The result was that anyone could supply a malicious array and breach the server’s security.
Kurz then furnished a video demo of the hack which is posted above. However, before doing so, he also notified the eBay team which, thankfully, was quick to respond. The vulnerability has been patched on the official site by now.
Courtesy: The Hacker News
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