touch-packages team mailing list archive

[Harry Willis <hwillis19@xxxxxxxxx>]

Marc, I've just upgraded to 4.3.7-ubuntu1.2 in trusty
(https://launchpad.net/ubuntu/+source/bash/4.3-7ubuntu1.2) which I
assume was supposed to protect against the test case provided for
CVE-2014-7169. It doesn't appear to have done so. Confirmed that the
upgrade was successfully applied.

harry@mars:~ aptitude show bash | egrep '^Version'
Version: 4.3-7ubuntu1.2

harry@mars:~$ md5sum /bin/bash Downloads/bash_4.3-7ubuntu1.2_amd64/bin/bash 
3c263963be49239e113a5794d54b732a  /bin/bash
3c263963be49239e113a5794d54b732a  Downloads/bash_4.3-7ubuntu1.2_amd64/bin/bash

harry@mars:~$ cat echo
cat: echo: No such file or directory

harry@mars:~$ env -i X='() { (a)=>\' bash -c 'echo date'
bash: X: line 1: syntax error near unexpected token `='
bash: X: line 1: `'
bash: error importing function definition for `X'

harry@mars:~$ cat echo
Fri Sep 26 00:38:09 BST 2014

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to bash in Ubuntu.
https://bugs.launchpad.net/bugs/1373781

Title:
  bash incomplete fix for CVE-2014-6271

Status in “bash” package in Ubuntu:
  Confirmed

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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