tecnmint: cat can do lots of interesting things…
Original URL: http://feedproxy.google.com/~r/linuxtoday/linux/~3/gotC42itS5c/how-to-use-cat-and-tac-commands-with-examples-in-linux-160408073156.html
tecnmint: cat can do lots of interesting things…
aria2 is a lightweight multi-protocol & multi-source command-line
download utility. It supports HTTP/HTTPS, FTP, SFTP,
BitTorrent and Metalink. aria2 can be manipulated via built-in
JSON-RPC and XML-RPC interfaces.
Download version 1.21.0.
There you can download source distribution and binaries for OS X, Windows and Android.
The legacy releases earlier than 1.19.1 are available
aria2 can download a file
from multiple sources/protocols and tries to utilize your
maximum download bandwidth. Really speeds up your download
aria2 doesn’t require much memory and CPU time. When disk cache is
off, the physical memory usage is typically 4MiB (normal
HTTP/FTP downloads) to 9MiB (BitTorrent downloads). CPU usage in
BitTorrent with download speed of 2.8MiB/sec is around 6%.
Fully Featured BitTorrent Client.
All features you want in BitTorrent client are available: DHT,
PEX, Encryption, Magnet URI, Web-Seeding, Selective Downloads,
Local Peer Discovery and UDP tracker.
aria2 supports The Metalink Download Description Format
(aka Metalink v4),
Metalink version 3 and
Metalink offers the file verification, HTTP/FTP/SFTP/BitTorrent integration
and the various configurations for language, location, OS, etc.
aria2 supports RPC interface to control the aria2 process.
The supported interfaces are JSON-RPC (over HTTP and WebSocket)
Command-line scares you off? No, aria2 is really easy to use!!
Download from WEB:
Download from 2 sources:
Download using 2 connections per host:
BitTorrent Magnet URI:
Download URIs found in text file:
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.
I often run across interesting ways that faculty can and do use technology in their courses – law faculty and others – and I decided to collect them all in one place for the benefit of law faculty seeking interesting ideas. Some ideas are more substantive than others, and they all require some small effort […]
Mossack Fonseca (MF), the Panamanian law firm at the center of the so called Panama Papers Breach may have been breached via a vulnerable version of Revolution Slider. The data breach has so far brought down the Prime Minister of Iceland and surrounded Russian President Putin and British Prime Minister David Cameron with controversy, among other famous public figures. It is the largest data breach to journalists in history, weighing in at 2.6 terabytes and 11.5 million documents.
Forbes have reported that MF was giving their customers access to data via a web portal running a vulnerable version of Drupal. We performed an analysis on the MF website and have noted the following:
The MF website runs WordPress and is currently running a version of Revolution Slider that is vulnerable to attack and will grant a remote attacker a shell on the web server.
Viewing this link on the current MF website to a Revolution Slider file reveals the version of revslider they are running is 2.1.7. Versions of Revslider all the way up to 3.0.95 are vulnerable to attack.
It appears that MF have now put their site behind a firewall which would protect against this vulnerability being exploited. This is a recent change within the last month.
Looking at their IP history on Netcraft shows that their IP was on the same network as their mail servers.
ViewDNS.info further confirms that this was a recent move to protect their website:
According to service crawler Shodan, one of the IP’s on their 184.108.40.206 network runs Exchange 2010 mail server which indicates this network block is either their corporate network or at the very least has a range of IT assets belonging to the company. We also show they’re running VPN remote access software.
You can view the IP addresses used for email for MF below which are all on the same network block:
To summarize so far:
A theory on what happened in the Mossack Fonseca breach:
A working exploit for the Revolution Slider vulnerability was published on 15 October 2014 on exploit-db which made it widely exploitable by anyone who cared to take the time. A website like mossfon.com which was wide open until a month ago would have been trivially easy to exploit. Attackers frequently create robots to hit URLs like : http://mossfon.com/wp-content/plugins/revslider/release_log.txt
Once they establish that the site is vulnerable from the above URL the robot will simply exploit it and log it into a database and the attacker will review their catch at the end of the day. It’s possible that the attacker discovered they had stumbled across a law firm with assets on the same network as the machine they now had access to. They used the WordPress web server to ‘pivot’ into the corporate assets and begin their data exfiltration.
Technical details of the vulnerability in Revolution Slider
This is a brief technical summary from one of our analysts describing the nature of the vulnerability in Revolution Slider that was exploited.
Revolution Slider (also known as Slider Revolution) version 3.0.95 or older is vulnerable to unauthenticated remote file upload. It has an action called `upload_plugin` which can be called by an unauthenticated user, allowing anyone to upload a zip file containing PHP source code to a temp directory within the revslider plugin.
The code samples below point you to where the specific problem is in revslider. Note that the revslider developer is allowing unprivileged users to make an AJAX (or dynamic browser HTTP) call to a function that should be used by privileged users only and which allows the creation of a file an attacker uploads.
A demonstration of Revolution Slider being exploited
The following video demonstrates how easy it is to exploit the Revolution Slider vulnerability on a website running the newest version of WordPress and a vulnerable version of Revolution Slider.
As a courtesy we have reached out to Mossack Fonseca to inform them about the Slider Revolution vulnerability on their site and have not yet received a response. They appear to be protected against it being exploited, or perhaps re-exploited in this case but the WordPress plugin on the site still needs updating.
To protect your WordPress installation it is critically important that you update your plugins, themes and core when an update becomes available. You should also monitor updates for security fixes and give those the highest priority. You can find out if a WordPress plugin includes a security update by viewing the changes in the “Changelog”.
In this case the site owners did not update for some time and it resulted in world leaders being toppled and the largest data breach to journalists in history.
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Chatbots could replace 1-800 numbers, and Facebook wants them on Messenger. But most businesses don’t have the resources or technical skills to build chatbots themselves. That’s why Facebook is currently providing developers with API tools to build chatbots and Live Chat web plug-ins for business clients, according to multiple sources and a leaked deck Facebook shared with devs.… Read More
SAN FRANCISCO (Reuters) – Verizon Communications Inc is ready to make a bid for Yahoo’s web business, and hopes to make a merger more successful by also making an offer for a stake in Yahoo’s Japan subsidiary, Bloomberg reported on Thursday, citing a source familiar with the matter.
opensource.com: Which technology will you use to deploy your next big application?
An anonymous reader quotes a report from VentureBeat: Google today launched Android Studio 2.0, the latest version of its integrated development environment (IDE), with a long list of new features. You can download the new version for Windows, Mac, and Linux now directly from Android.com/SDK. In November, Google unveiled Android Studio 2.0, the second major version of its IDE. Version 2.0 brings a slew of improvements, including Instant Run, a faster Android emulator, and app indexing improvements. Google released a beta in February, though it didn’t say when the final version would be ready ([VentureBeat] speculated in time for its I/O developer conference in May, and the company debuted with a month to spare).
The full feature list includes Instant Run, Android Emulator, Cloud Test Lab, App Indexing, and GPU Debugger Preview.
Read more of this story at Slashdot.