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Bash bug: Shell Shocked yet? You will be … when this goes WORM

Posted on September 26, 2014 by Dissent

Darren Pauli reports:

Much of the impact of the Shell Shocked vulnerability is unknown and will surface in the coming months as researchers, admins and attackers (natch) find new avenues of exploitation.

The vulnerability, coined Shell Shocked by researcher Robert Graham, existed in the Bash command interpreter up to version 4.3 and affected scores of servers, home computers and embedded devices.

Read more on The Register.

Brian Krebs adds:

The problem resides with a weakness in the GNU Bourne Again Shell (Bash), the text-based, command-line utility on multiple Linux and Unix operating systems. Researchers discovered that if Bash is set up to be the default command line utility on these systems, it opens those systems up to specially crafted remote attacks via a range of network tools that rely on it to execute scripts, from telnet and secure shell (SSH) sessions to Web requests.

According to several security firms, attackers are already probing systems for the weakness, and that at least two computer worms are actively exploiting the flaw to install malware. Jamie Blasco, labs director at AlienVault, has been running a honeypot on the vulnerability since yesterday to emulate a vulnerable system.

Read more on KrebsOnSecurity.

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