touch-packages team mailing list archive

[Simon Déziel <1373781@xxxxxxxxxxxxxxxxxx>]

On 09/26/2014 03:49 PM, Spyros wrote:
> spyros@prod01:~# env X='() { (a)=>\' bash -c "echo date"; cat echo
> bash: X: line 1: syntax error near unexpected token `='
> bash: X: line 1: `'
> bash: error importing function definition for `X'
> Fri Sep 26 12:13:33 PDT 2014
> 
> I apologize if this is a stupid question, but why is it that the second case still works?
> Doesn't this mean that the system is still vulnerable to CVE-2014-7169?

Maybe you had a leftover file named "echo" in root's home? If yes,
remove it and retest.

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https://bugs.launchpad.net/bugs/1373781

Title:
  bash incomplete fix for CVE-2014-6271

Status in “bash” package in Ubuntu:
  Fix Released
Status in “bash” source package in Lucid:
  Fix Released
Status in “bash” source package in Precise:
  Fix Released
Status in “bash” source package in Trusty:
  Fix Released
Status in “bash” source package in Utopic:
  Fix Released

Bug description:
  The fixes for CVE-2014-6271 do NOT work! Security vuln, but should be
  public, this is known already.

  Ubuntu 14.04 LTS: bash 4.3-7ubuntu1.1
  Ubuntu 12.04 LTS: bash 4.2-2ubuntu2.2
  Ubuntu 10.04 LTS: bash 4.1-2ubuntu3.1

  Testcase:
  rm -f echo && env -i  X='() { (a)=>\' bash -c 'echo id'; cat echo

  expected output:
  bash: X: line 1: syntax error near unexpected token `='
  bash: X: line 1: `'
  bash: error importing function definition for `X'
  id

  actual output:
  bash: X: line 1: syntax error near unexpected token `='
  bash: X: line 1: `'
  bash: error importing function definition for `X'
  uid=0(root) gid=0(root) groups=0(root)

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