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Bash Security

(9 posts) (4 voices)

• Started 10 years ago by hackdorte
• Latest reply from sixofeight
• This topic is not a support question

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1. 

   hackdorte
   

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   Hi. I have a question.

   The Bash package for slitaz 4 already has the security patch?

   Or we have to apply them manually?

   Posted 10 years ago #
2. 

   sixofeight
   

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   Well,I'm still using Slitaz4 with the ash-shell which seems not to be affected.
   For bash the headlines state everything through 4.3 is affected.
   Try this commands and you will see:

   env x='() { :;}; echo vulnerable' bash -c 'echo hello'

   test="() { echo Hello; }; echo gehackt" bash -c ""

   good luck.

   Posted 10 years ago #
3. 

   Bellard
   

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   Key Master

   See http://hg.slitaz.org/wok-stable/rev/853a028198ee

   tux@slitaz:~$ cat /etc/slitaz-release
   4.0
   tux@slitaz:~$ env x='() { :;}; echo vulnerable' bash -c 'echo hello'
   bash: warning: x: ignoring function definition attempt
   bash: error importing function definition for `x'
   hello
   tux@slitaz:~$ test="() { echo Hello; }; echo gehackt" bash -c ""
   bash: warning: test: ignoring function definition attempt
   bash: error importing function definition for `test'

   Posted 10 years ago #
4. 

   hackdorte
   

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   @sixofeight, @Bellard

   I depend on the bash to run some programs in the system.

   I did the tests and everything works perfectly.

   Thanks for all replies.

   Posted 10 years ago #
5. 

   sixofeight
   

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   Here is a script that claims to test bash for all so far known vulnerabilities.
   It checks against 6 public vulnerabilities.
   https://github.com/hannob/bashcheck

   Posted 10 years ago #
6. 

   gibor
   

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   Moderator

   There is my result

   Testing /bin/bash ...
   GNU bash, versione 4.3.30(3)-release (i686-pc-linux-gnu)

   Variable function parser pre/suffixed [%%, upstream], bugs not exploitable
   Not vulnerable to CVE-2014-6271 (original shellshock)
   Not vulnerable to CVE-2014-7169 (taviso bug)
   Not vulnerable to CVE-2014-7186 (redir_stack bug)
   Test for CVE-2014-7187 not reliable without address sanitizer
   Not vulnerable to CVE-2014-6277 (lcamtuf bug #1)
   Not vulnerable to CVE-2014-6278 (lcamtuf bug #2)

   and this is pack http://www.freefilehosting.net/bash-43
   warning, work for me, but the receipt is not complete.

   Posted 10 years ago #
7. 

   sixofeight
   

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   I installed bash (slitaz 4), using SliTaz-Panel,like an average Joe would do it.
   Test results:

   root@slitaz:/home/tux# ./bashcheck
   Testing /bin/bash ...
   GNU bash, version 4.2.0(2)-release (i486-slitaz-linux-gnu)

   Variable function parser active, maybe vulnerable to unknown parser bugs
   Not vulnerable to CVE-2014-6271 (original shellshock)
   Vulnerable to CVE-2014-7169 (taviso bug)
   Vulnerable to CVE-2014-7186 (redir_stack bug)
   Test for CVE-2014-7187 not reliable without address sanitizer
   Vulnerable to CVE-2014-6277 (lcamtuf bug #1)
   Not vulnerable to CVE-2014-6278 (lcamtuf bug #2)

   ..oops...

   Posted 10 years ago #
8. 

   Bellard
   

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   Key Master

   Try this:
   # tazpkg recharge
   # tazpkg get-install bash

   See the bottom of http://cook.slitaz.org/stable/cooker.cgi?pkg=bash

   Testing /home/slitaz/wok/bash/install/bin/bash ...
   GNU bash, version 4.2.53(2)-release (i486-slitaz-linux-gnu)

   Variable function parser pre/suffixed [%%, upstream], bugs not exploitable
   Not vulnerable to CVE-2014-6271 (original shellshock)
   Not vulnerable to CVE-2014-7169 (taviso bug)
   Not vulnerable to CVE-2014-7186 (redir_stack bug)
   Test for CVE-2014-7187 not reliable without address sanitizer
   Not vulnerable to CVE-2014-6277 (lcamtuf bug #1)
   Not vulnerable to CVE-2014-6278 (lcamtuf bug #2)

   Posted 10 years ago #
9. 

   sixofeight
   

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   Hi Bellard
   Yup, Patch.level-53 = Problems solved...
   and no segfaults anymore in /var/log/messages...
   well done....thanks a lot..

   Slitaz 4 User...updating..NOW...;-)

   Posted 10 years ago #

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