Thousands of Android devices infected with unremovable xHelper malware
In the latest, another malware named xHelper is on the rise of infecting Android based devices, a number staggering over 45,000.
AWS hit by massive DDoS attacks that lasted 8 hours
Amazon Web Services (AWS) - was hit by a series of DDoS attacks (Distributed Denial of Service) resulting in portions of it going offline for several hours.
New malware targets Discord users to steal personal data
Lately, they have been in trouble due to their Microsoft Windows app being infected with malware. Since it is built using an opensource framework named Electron.
![[hlink][/hlink] CPDoS can be used to attack content delivery networks (CDNs) to serve error pages instead of legitimate sites through caching. Freshly termed as a Cache Poisoned Denial of Service (CPDoS) attack, two academics from the Cologne University of Applied Sciences in Germany have discovered [PDF] how content delivery networks can be attacked to serve error pages instead of legitimate sites through caching. In normal circumstances, when the user re-visits a website, they are served a cached version of it through a content delivery network such as Cloudflare. On the other hand, during the poisoning process, the attacker visits a website with the intention of generating a request for the web page from the CDN. However, the request, in this case, contains a malformed header which can be from the following 3 options: [wp_ad_camp_2] [wp_ad_camp_1] An HTTP Header Oversize (HHO) An HTTP Meta Character (HMC) An HTTP Method Override (HMO) Any of these, in turn, cause an error on the webserver. As a part of regular operations, the error page is then cached on the CDN and in turn served to legitimate users. Slowly, it spreads to other nodes of the CDN as they are updated hence giving the impression of the site being unavailable globally successfully completing the attack. This could cause both a reputational loss and financial losses as well for mission-critical websites. This was further confirmed by the researchers themselves along the lines of, To get a clearer picture on the real life impact of CPDoS attacks, we took some samples based on the URLs from the Alexa Top 500, DoD, and HTTP Archive data sets. Overall, we found twelve vulnerable resources within a few days. These also include mission-critical websites such as ethereum.org, marines.com, and nasa.gov which use CloudFront as CDN. At all these websites, we were able to block multiple resources including scripts, style sheets, images, and even dynamic content such as the start page. [hlink][/hlink] Example screenshot on Marines.com website: An example showcased by the researchers of a before and after scenario of the attack on Marines.com. For those of you wondering when your site is getting poisoned, you can relax and luckily take a series of precautions. The first one is that you could turn off the caching of HTTP error pages by default on your CDN service through predefined options or by editing your server's configuration files. Hence, the error page will never be distributed by the CDN en masse. [wp_ad_camp_2] [wp_ad_camp_1] Secondly, you could make sure your CDN provider is complying with standard caching protocols. One of these involves caching only certain error pages such as the "404 Not Found" but not others such as the "400 Bad Request" one which is generated because of such an attack. A table allowing one to analyze the errors different CDN providers cache. Continuing with the often seen pattern in the cybersecurity world, these revelations were also followed with responsible disclosure leading to companies like Microsoft and Amazon taking action to fix the problem at hand. However, some companies like Flask have still not responded according to the researchers and so it is yet to be seen how the customers of such firms will react. For users looking to do further research on the subject in more detail, they can visit a recently released website by the team at CPDOS. CPDoS variation - HTTP Header Oversize (HHO) from BleepingComputer.com on Vimeo. Did you enjoy reading this article? Kindly do like our page on Facebook and follow us on Twitter.](https://hackread.com/wp-content/uploads/2019/10/cache-poisoned-denial-of-service-cpdos-with-cdn.png)
Millions of websites using CDNs at risk of CPDoS attack
CPDoS can be used to attack content delivery networks (CDNs) to serve error pages instead of legitimate sites through caching.
After Avast, NordVPN server gets hacked
NordVPN, in a blog post made yesterday on 21 October explains that one of their leased data centers in Finland was accessed unauthorizedly.
Avast hacked after attackers gained domain admin privileges
Just today, the cyber security giant Avast revealed in a blog post that they were hacked in May earlier this year in an attempt they have termed as "Abiss."
Programmer hacks his attacker; releases decryption keys for Mushtik ransomware
“Hey guys, I hacked back this criminal and got the whole database with (Mushtik ransomware) keys.” The last…
Hackers found tracking web traffic of Chrome and Firefox browsers
This, however, is not the first time when Chrome and Firefox browsers have been targeted in one attack altogether. Last year, Vega Stealer malware was caught stealing saved passwords and credit/debit card data from Chrome and Firefox users.
Signal app flaw allowed incoming calls to be connected without user interaction
This little eavesdropping process happened to be possible because of a method named "handleCallConnected" in their Android client.
New malware mimics Windows scanner to infect PCs with ransomware
This trojan horse was discovered which pretends to be a Windows scanner by Microsoft but in reality, it is everything evil but so.