Bug 192474
| Summary: | Command halts the system | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Hugo Cisneiros <hugo> |
| Component: | bash | Assignee: | Tim Waugh <twaugh> |
| Status: | CLOSED NOTABUG | QA Contact: | Ben Levenson <benl> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2006-05-19 21:54:19 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
You need to set user limits with 'ulimit' or PAM's limits.conf. Thank you for the input, I was already thinking of this... BTW, isn't be good to set a reasonable limit in FC defaults? As any user can execute that, normal users can be tricked to execute this, hanging the system. I think that preventing this per default is a good thing :) Just a thought. |
Description of problem: I don't know if this is really a bug in bash, but it's worthy looking. When any user executes a certain command, the system halts and becomes inaccessible (even with ssh). This is really annoying and brings some concerns about system security. The command is: (:(){ :|:;};:) Version-Release number of selected component (if applicable): bash-3.1-6.2 How reproducible: Steps to Reproduce: 1. Open a terminal as any user (root or not root) 2. Type the following command: (:(){ :|:;};:) 3. Press Enter and see your system hanging and Hard Disk working.