Ubuntu
pam package

bash command forks unlimited number of childs with user rights

Bug #127897 reported by Andreas Schmidt
4
Affects Status Importance Assigned to Milestone
pam (Ubuntu)
New
Undecided
Unassigned

Bug Description

Binary package hint: bash

As the normal working user on my Kubuntu 7.04 I started the bash and entered the following command:
:(){ :|:& };:
This is a recursive call for 2 childs of the current process, and it will freeze your system in a couple of seconds.
I tried this on several systems (Notebook and Desktop, both with 7.04) and each time it crashes.
For example, I tried this with a Knoppix Live CD, and the system did not crash, cause the max. number of childs you can fork is limited for a standart user.
I think this should be added to the standart Kernel configuration of Kubuntu too.

Revision history for this message
Andreas Schmidt (aschmidt1982) wrote :

My actual Kernel is 2.6.20-16 on a 32Bit Architecture

Changed in bash:
assignee: nobody → kernel-bugs
Revision history for this message
Kees Cook (kees) wrote :

Thanks for taking the time to report this bug and helping to make Ubuntu better. This bug has already been reported, and is being worked on.

Changed in bash:
assignee: kernel-bugs → nobody
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