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[Phillip Sz <1411318@xxxxxxxxxxxxxxxxxx>]

** Description changed:

  "The problem with bash's name references
  
  Bash 4.3 introduced declare -n ("name references") to mimic Korn shell's
  nameref feature, which permits variables to hold references to other
- variables (see FAQ 006 to see these in action). Unfortunately, the
- implementation used in Bash has some issues.
+ variables (..). Unfortunately, the implementation used in Bash has some
+ issues.
  
  {…} Bash's name reference implementation still allows arbitrary code
  execution:
  
  $ foo() { declare -n var=$1; echo "$var"; }
  $ foo 'x[i=$(date)]'
  bash: i=Thu Mar 27 16:34:09 EDT 2014: syntax error in expression (error token is "Mar 27 16:34:09 EDT 2014")
  
  It's not an elegant example, but you can clearly see that the date
  command was actually executed. This is not at all what one wants."
  
  source: http://mywiki.wooledge.org/BashFAQ/048

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https://bugs.launchpad.net/bugs/1411318

Title:
  arbitrary code execution

Status in bash package in Ubuntu:
  Confirmed

Bug description:
  "The problem with bash's name references

  Bash 4.3 introduced declare -n ("name references") to mimic Korn
  shell's nameref feature, which permits variables to hold references to
  other variables (..). Unfortunately, the implementation used in Bash
  has some issues.

  {…} Bash's name reference implementation still allows arbitrary code
  execution:

  $ foo() { declare -n var=$1; echo "$var"; }
  $ foo 'x[i=$(date)]'
  bash: i=Thu Mar 27 16:34:09 EDT 2014: syntax error in expression (error token is "Mar 27 16:34:09 EDT 2014")

  It's not an elegant example, but you can clearly see that the date
  command was actually executed. This is not at all what one wants."

  source: http://mywiki.wooledge.org/BashFAQ/048

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