Each day at CloudFlare is full of surprises. As it turns out, it takes a lot of work to stop massive attacks and to help make the web faster. Over the past six months, our entire team has contributed in every way imaginable to more than double the capacity of our global network. Below is […]
CloudFlare DNS is simple, fast and flexible
Over the past few years, the CloudFlare blog has covered a great range of different topics, drilling down into the technology we use to both protect websites from attack, and optimise them so that they load faster for visitors. One thing we haven’t spent enough time talking about so far though also happens to be […]
Killing RC4 (softly)
Back in 2011, the BEAST attack on the cipher block chaining (CBC) encryption mode used in TLS v1.0 was demonstrated. At the time the advice of experts (including our own) was to prioritize the use of RC4-based cipher suites. The BEAST vulnerability itself had already been fixed in TLS v1.1 a few years before, but […]
CloudFlare Transparency Report on National Security Orders
Earlier today, the Department of Justice and the Director of National Intelligence announced a change in rules governing the disclosure of National Security Orders, including National Security Letters (NSLs) received by a company. The DoJ and DNI now allow companies to disclose the number of NSLs and FISA orders as a single number in bands […]
Website Mesh Networks Distributing Malware
Can you imagine having the keys to a kingdom? How awesome would that be!! This is true in all domains, especialy when it comes to your website. This is almost like the holy grail of website attacks, gain access and do what you want with someone else’s pride and joy. We all know that once […]
Recent OptimizePress Vulnerability Being Mass Infected
A few weeks ago we wrote about a file upload vulnerability in the OptmizePress theme. We were seeing a few sites being compromised by it, but nothing major. That all changed yesterday when we detected roughly 2,000 websites compromised with iFrames that seemed to be caused by this same vulnerability. All of the contaminated websites […]
The Hidden Backdoors to the City of Cron
An attackers key to creating a profitable malware campaign is its persistency. Malicious code that is easily detected and removed will not generate enough value for their creators. This is the reason why we are seeing more and more malware using creative backdoor techniques, different obfuscation methods, and using unique approaches to increase the lifespan […]
Sucuri Company Meeting – Brazil 2014
2013 was a great year for Sucuri! We were able to add some great services and tools like CloudProxy to help website owners and administrators fight malware. We also grew the Sucuri team quite a bit in an effort to support our products, and more importantly our customers. We’re very excited about the future, so […]
Security issue on vBulletin’s uploader.swf
The vBulletin team recently disclosed a XSS (cross site scripting) vulnerability in the uploader.swf file that is included by default on vBulletin 4 and 5. This file comes from the YUI library that is not supported anymore, so the vBulletin team is recommending everyone to remove that file asap from their installs. This is their […]
How the NSA (may have) put a backdoor in RSA’s cryptography: A technical primer
There has been a lot of news lately about nefarious-sounding backdoors being inserted into cryptographic standards and toolkits. One algorithm, a pseudo-random bit generator, Dual_EC_DRBG, was ratified by the National Institute of Standards and Technology (NIST) in 2007 and is attracting a lot of attention for having a potential backdoor. This is the algorithm into […]
