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John Lemke

Java-based malware driving DDoS botnet infects Windows, Mac, Linux devices | Ars Technica - 0 views

arstechnica.com/...ects-windows-mac-linux-devices

2014 malware ddos windows mac linux technology tech security botnet

shared by John Lemke on 29 Jan 14 - No Cached
  • takes hold of computers by exploiting CVE-2013-2465, a critical Java vulnerability that Oracle patched in June. The security bug is present on Java 7 u21 and earlier. Once the bot has infected a computer, it copies itself to the autostart directory of its respective platform to ensure it runs whenever the machine is turned on. Compromised computers then report to an Internet relay chat channel that acts as a command and control server.
  • The botnet is designed to conduct distributed denial-of-service attacks on targets of the attackers' choice. Commands issued in the IRC channel allow the attackers to specify the IP address, port number, intensity, and duration of attacks.
John Lemke

Hackers Using 'Shellshock' Bash Vulnerability to Launch Botnet Attacks - 0 views

thehackernews.com/...ash-Vulnerability-exploit.html

2014.09.29-TNN indienationnews vulnerability bash hackers security vunerability

shared by John Lemke on 27 Sep 14 - No Cached
  • Researchers on Thursday discovered a critical remotely exploitable vulnerability in the widely used command-line shell GNU Bourne Again Shell (Bash), dubbed "Shellshock" which affects most of the Linux distributions and servers worldwide, and may already have been exploited in the wild to take over Web servers as part of a botnet that is currently trying to infect other servers as well.
  • the vulnerability is already being used maliciously by the hackers.
  • There is as of yet no official patch that completely addresses both vulnerabilities, including the second, which allows an attacker to overwrite files on the targeted system.
  • ...3 more annotations...
  • It's things like CGI scripts that are vulnerable, deep within a website (like CPanel's /cgi-sys/defaultwebpage.cgi)," Graham wrote in a blog post. "Getting just the root page is the thing least likely to be vulnerable. Spidering the site and testing well-known CGI scripts (like the CPanel one) would give a lot more results—at least 10x." In addition, Graham said, "this thing is clearly wormable and can easily worm past firewalls and infect lots of systems. One key question is whether Mac OS X and iPhone DHCP service is vulnerable—once the worm gets behind a firewall and runs a hostile DHCP server, that would be 'game over' for large networks."
  • 32 ORACLE PRODUCTS VULNERABLE
  • PATCH ISSUED, BUT INCOMPLETE
  • John Lemke on 27 Sep 14
     
    "Researchers on Thursday discovered a critical remotely exploitable vulnerability in the widely used command-line shell GNU Bourne Again Shell (Bash), dubbed "Shellshock" which affects most of the Linux distributions and servers worldwide, and may already have been exploited in the wild to take over Web servers as part of a botnet that is currently trying to infect other servers as well."
John Lemke

Recent News | Automotive Grade Linux - 0 views

automotive.linuxfoundation.org/recent-news

indienationnews 2014 automotive linux opensource IN-Pub

shared by John Lemke on 02 Jul 14 - No Cached
  • John Lemke on 02 Jul 14
     
    This will likely be a topic on the next news show. Be sure to join #indination on geekshed.net IRC to find out how you can get on the air with us.
John Lemke

Shellshock: Code injection vulnerability found in Bash | LIVE HACKING - 0 views

www.livehacking.com/...on-vulnerability-found-in-bash

2014.09.29-TNN code bash hacking indienationnews 2014 technology tech security

shared by John Lemke on 26 Sep 14 - No Cached
  • A code injection vulnerability in the Bourne again shell (Bash) has been disclosed on the internet. If exploited then arbitrary commands can be executed, and where Bash is used in relation to a network service, for example in CGI scripts on a web server, then the vulnerability will allow remote code execution.
  • The problem is that Bash does not stop after processing the function definition; it continues to parse and execute any shell commands following the function definition
  • The vulnerability is deemed as critical because Bash is used widely on many types of UNIX-like operating systems including Linux, BSD, and Mac OS X.
  • ...1 more annotation...
  • The most prominent attack vector is via HTTP requests sent to CGI scripts executed by Bash. Also, if SSH has been configured to allow remote users to run a set of restricted commands, like rsync or git, this bug means that an attacker can use SSH to execute any command and not just the restricted command.
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