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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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