Bug 1255951
| Summary: | SELinux policy prevents lircd from dropping privileges | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Michael Chapman <redhat-bugzilla> |
| Component: | selinux-policy-targeted | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED EOL | QA Contact: | Ben Levenson <benl> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 22 | CC: | dwalsh |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-07-19 17:37:26 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: | |||
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed. |
This bug is reported against selinux-policy-targeted-3.13.1-128.10.fc22.noarch. lircd can be configured to run as a low-privilege user through its --effective-user command-line option or effective-user config option. This is thwarted by the current SELinux targeted policy on F22, however, as it does not permit lircd to read /etc/passwd and /etc/group or call setuid() and setgid(). lircd continues to run as the root user if SELinux is enforcing. The log message from lircd is: lircd-0.9.2a[15384]: Illegal effective uid: lirc: Permission denied This is from its attempt to call getpwnam on the username "lirc" (i.e. reading /etc/passwd). My workaround is the following custom policy: policy_module(my_lircd, 1.0.0) gen_require(` type lircd_t; ') auth_read_passwd(lircd_t) allow lircd_t self:capability { setuid setgid }; setgid() isn't used by lirc 0.9.2, but it will be by lirc 0.9.3.