Back in 2019, I explained how browsers’ cookie controls and privacy features present challenges for common longstanding patterns for authentication flows. Such flows often rely upon an Identity Provider (IdP) having access to its own cookies both on top-level pages served by the IdP and when the IdP receives a HTTP request from an XmlHttpRequest/fetchContinue reading “Auth Flows in a Partitioned World”
Author Archives: ericlaw
Explainer: File Types
On all popular computing systems, all files, at their most basic, are a series of bits (0 or 1), organized into a stream of bytes, each of which uses 8 bits to encode any of 256 possible values. Regardless of the type of the file, you can use a hex editor to view (or modify)Continue reading “Explainer: File Types”
How Microsoft Edge Updates
By default, Edge will update in the background automatically while you’re not using it. Open Microsoft Edge and you’ll be using the latest version. However, if Edge is already running and an update becomes available, an update notifier icon will show in the Edge toolbar. When you see the update notifier (a green or redContinue reading “How Microsoft Edge Updates”
Attack Techniques: Spoofing via UserInfo
I received the following phishing lure by SMS a few days back: The syntax of URLs is complicated, and even tech-savvy users often misinterpret them. In the case of the URL above, the actual site’s hostname is brefjobgfodsebsidbg.com, and the misleading http://www.att.net:911 text is just a phony username:password pair making up the UserInfo component ofContinue reading “Attack Techniques: Spoofing via UserInfo”
Going Electric – Solar
For years now, I’ve wanted to get solar panels for my house in Austin, both because it feels morally responsible and because I’m a geek and powering my house with carbon-free fusion seems neat. Economically, I assume I’ll eventually break even with solar power, but probably not for a long time– my house isn’t largeContinue reading “Going Electric – Solar”
Improving Native Message Host Reliability on Windows
Last Update: Nov 28, 2023 Update: This change was checked into Chromium 113 before being backed out. The plan is to eventually turn it on-by-default, so extension authors really should read this post and update their extensions if needed. The feature was relanded inside Chrome Canary version 115.0.5789.0. It’s off-by-default, behind a flag on theContinue reading “Improving Native Message Host Reliability on Windows”
Attack Techniques: Open Redirectors, CAPTCHAs, Site Proxies, and IPFS, oh my
The average phishing site doesn’t live very long– think hours rather than days or weeks. Attackers use a variety of techniques to try to keep ahead of the Defenders who work tirelessly to break their attack chains and protect the public. Defenders have several opportunities to interfere with attackers: Each of these represents a weakContinue reading “Attack Techniques: Open Redirectors, CAPTCHAs, Site Proxies, and IPFS, oh my”
Slow Seaside Half
After my first real-world half marathon in January, I ended up signing up for the 2024 race, but I also quickly decided that I didn’t want to wait a full year to give it another shot. A day or so later, I signed up for the Galveston Island Half Marathon at the end of February,Continue reading “Slow Seaside Half”
Q: “Remember this Device, Doesn’t?!?”
Q: Many websites offer a checkbox to “Remember this device” or “Remember me” but it often doesn’t seem to work. For example, this option on AT&T’s website shown when prompting for a 2FA code: …doesn’t seem to work. What’s up with that? A: Unfortunately, there’s no easy answer here. There is no browser standard forContinue reading “Q: “Remember this Device, Doesn’t?!?””
Attack Techniques: Blended Attacks via Telephone
Last month, we looked at a technique where a phisher serves his attack from the user’s own computer so that anti-phishing code like SmartScreen and SafeBrowsing do not have a meaningful URL to block. Another approach for conducting an attack like this is to send a lure which demands that the victim complete the attackContinue reading “Attack Techniques: Blended Attacks via Telephone”
text/plain 