Bug 425982
| Summary: | (selinux) chsh fails to set scponly | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Warren Togami <wtogami> |
| Component: | selinux-policy | Assignee: | Daniel Walsh <dwalsh> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | rawhide | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Current | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2008-01-30 19:20:16 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: | |||
NOTE: scponly is not a normal general-purpose shell. It is meant to restrict a user to use only scp or sftp for file transfers. They should not be able to run other commands or obtain a real shell. Is there any way to restrict scponly from using other commands or obtaining a real shell? The latest updated policy should fix this, selinux-policy-3.2.4-3 allows chsh/chfn to execute bin_t. Currently we transition to usertype_t when you login via ssh. (unconfined_t, user_t, guest_t) So we could attempt a special label for this shell, but I think we would end up needing to modify sshd or pam_selinux to get it to work correctly. Fixed in selinux-policy-3.2.4-3.fc9 Bulk closing all bugs in Fedora updates in the modified state. If you bug is not fixed, please reopen. |
[root@newcaprica ~]# yum install scponly [root@newcaprica ~]# chsh test Changing shell for test. New shell [/bin/bash]: /usr/bin/scponly chsh: "/usr/bin/scponly" is not executable. type=AVC msg=audit(1197906784.995:40): avc: denied { execute } for pid=7906 comm="chsh" name="scponly" dev=dm-3 ino=364718 scontext=unconfined_u:system_r:chfn_t:s0-s0:c0.c1023 tcontext=system_u:object_r:bin_t:s0 tclass=file type=SYSCALL msg=audit(1197906784.995:40): arch=c000003e syscall=21 success=no exit=-13 a0=2aaaaaccea90 a1=1 a2=2aaaaacceaa0 a3=0 items=0 ppid=7512 pid=7906 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts1 comm="chsh" exe="/usr/bin/chsh" subj=unconfined_u:system_r:chfn_t:s0-s0:c0.c1023 key=(null) Can this be fixed in selinux-policy?