Bug 1948586
| Summary: | Ksh allows exiting restricted mode, besides documented as not allowing | |||
|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Paulo Andrade <pandrade> | |
| Component: | ksh | Assignee: | Vincent Mihalkovič <vmihalko> | |
| Status: | CLOSED WONTFIX | QA Contact: | Karel Volný <kvolny> | |
| Severity: | low | Docs Contact: | ||
| Priority: | unspecified | |||
| Version: | 7.9 | CC: | jeroen.tulp | |
| Target Milestone: | rc | Flags: | pm-rhel:
mirror+
|
|
| Target Release: | --- | |||
| Hardware: | All | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | ||
| Doc Text: | Story Points: | --- | ||
| Clone Of: | ||||
| : | 1948588 (view as bug list) | Environment: | ||
| Last Closed: | 2023-06-28 14:17:27 UTC | Type: | Bug | |
| Regression: | --- | Mount Type: | --- | |
| Documentation: | --- | CRM: | ||
| Verified Versions: | Category: | --- | ||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
| Cloudforms Team: | --- | Target Upstream Version: | ||
| Embargoed: | ||||
| Bug Depends On: | ||||
| Bug Blocks: | 1948588 | |||
Upstream commit: https://github.com/ksh93/ksh/commit/74b4162178c8a2347491b9fd3a22d8e6e1b7e831 Thus this bug is fixed in ksh on all versions of rhel-9 and higher. Development Management has reviewed and declined this request. You may appeal this decision by reopening this request. |
From manual page: -r Enables the restricted shell. This option cannot be unset once set. But one can exit it with: $ set +r One can work an a restricted shell with: + Create a ~/.profile that sets PATH to, for example, /rbin + Add symbolic links to /rbin, e.g. # ln -sf /bin/ls /rbin + Remove any unwanted environment variable or function from ~/.profile with unset. Above works with bash, on basic tests using .bash_profile: export PATH=/rbin unset command_not_found_handle and user shell set to /bin/rbash Restricted shells overall are somewhat of a fragile solution, but if the environment is really very small, it is a somewhat safe option.