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Detecting VPN (and its configuration) and proxy users on the server side
A lot of people use VPN every day. Somebody use it in always-on mode to circumvent government or corporative internet censorship, while…
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Releasing jsfunfuzz and DOMFuzz
Today I'm releasing two fuzzers: jsfunfuzz , which tests JavaScript engines, and DOMFuzz , which tests layout and DOM APIs.
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Tarsnap exploit bounty
Most bugs are straightforward, but occasionally one comes up which is not so clear in its impact. Such is the case with a bug which is fixed in tarsnap 1.0.36 . This bug causes the NUL string termination byte to overflow the heap-allocated buffer used for paths of objects examined as tarsnap traverses a directory…
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How widely used are security-based HTTP response headers?
In this blog I look at how widespread the usage of common security based HTTP response headers are in the Alexa Top 1 Million most visited sites.
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Tracking a Bluetooth Skimmer Gang in Mexico (Part I)
-Sept. 9, 12:30 p.m. CT, Yucatan Peninsula, Mexico: Halfway down the southbound four-lane highway from Cancun to the ancient ruins in Tulum, traffic inexplicably slowed to a halt. There was some sort of checkpoint ahead by the Mexican Federal Police. I began to wonder whether it was a good idea to have brought along…
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PuTTY 0.66 fixes security vulnerability
Home | FAQ | Feedback | Licence | Updates | Mirrors | Keys | Links | Team Download: Stable · Snapshot | Docs | Privacy | Changes | Wishlist
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Invisible Click Tracking Using “Empty” UTF-8 Characters
Have a look at this URL linking to this post: https://kaspars.net/blog/invisible-click-tracking Notice any tracking variables? Me neither! But check out the HTTP request and response in the network inspector of your browser -- it is redirecting to the "same" URL: URL encoded special characters in the browser console…
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Audi Cruise Control Bug
I noticed a "bug" in the way Audi handles its Cruise Control options. Cruise control is only meant to be used once you drive "30 kilometers per hour or more". …
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TSA Sued Over New Policy to Refuse Opt-Outs
Last Friday, the TSA snuck out a document updating the “privacy policy” for the nude body scanners. On Tuesday, reports started coming in on the change, including right here. Professi…
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Teensy weensy crypto
As the UK's politicians continue to fail to understand what "strong cryptography" or "banning" even mean, I thought I would have a look at how simple strong cryptography can be.
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Break a dozen secret keys, get a million more for free
[An in-depth blog post by Daniel J. Bernstein, crossposted between the ECRYPT blog and the cr.yp.to blog .]
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Opportunistic Encryption for Firefox
Firefox 37 brings more encryption to the web through opportunistic encryption of some http:// based resources. It will be released the week ...
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Hopefully the last post I'll ever write on Dual EC DRBG
I’ve been working on some other blog posts, including a conclusion of (or at least an installment in) this exciting series on zero knowledge proofs. That’s coming soon, but first I want…
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Yubico with new 4096-bit keys and gpg-agent for ssh authentication
Collection of my projects and hacks.
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Reassessing Airport Security
News that the Transportation Security Administration missed a whopping 95% of guns and bombs in recent airport security “red team” tests was justifiably shocking. It’s clear that we’re not getting value for the $7 billion we’re paying the TSA annually. But there’s another conclusion, inescapable and disturbing to…
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W^X policy violation affects Windows drivers compiled in VS 2013 and previous
Back in June, I was doing some analysis on a Windows driver and discovered that the INIT section had the read, write, and executable characteristics flags set. Windows executables (drivers included…
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Lizard Stresser Runs on Hacked Home Routers
The online attack service launched late last year by the same criminals who knocked Sony and Microsoft ’s gaming networks offline over the holidays is powered mostly by thousands of hacked home Internet routers, KrebsOnSecurity.com has discovered.
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Faking the TCP handshake
Update: This article has been superseded by a new post which hopefully explains it more clearly: Spoofing TCP connections without sequence number prediction
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How botnets are created with hijacked Worpess, fake Flash downloads and Node.js
I just noticed the website of an old employer has been hacked and some JavaScript is injected into their corporate website that runs on WordPress. Ouch. Of course I notified them about it and they’re just trying to figure out what happened and how to fix it.
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Let’s encrypt automation on Debian
NOTE: This article is old, this hack is no longer necessary, as Debian includes dehydrated that makes all the work. Free SSL certificates for everyone! the https://letsencrypt.org/ initiative backed by Akamai, Cisco, Mozilla and EFF, is going to offer free certificates. On this post I am going to explain how I have…
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From kafkatrap to honeytrap
The short version is: if you are any kind of open-source leader or senior figure who is male, do not be alone with any female, ever, at a technical conference. Try to avoid even being alone , ever, because there is a chance that a “women in tech” advocacy group is going to try to collect your scalp.