Bug 118123
| Summary: | kdm accesses /dev/mem | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Russell Coker <russell> |
| Component: | kdebase | Assignee: | Than Ngo <than> |
| Status: | CLOSED DUPLICATE | QA Contact: | Ben Levenson <benl> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 2 | CC: | aleksey |
| 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: | 2006-02-21 19:01:56 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: | |||
*** This bug has been marked as a duplicate of 118051 *** Changed to 'CLOSED' state since 'RESOLVED' has been deprecated. |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (compatible; Konqueror/3.2; Linux) (KHTML, like Gecko) Description of problem: audit(1079007629.554:0): avc: denied { read } for pid=2098 exe=/usr/bin/kdm name=mem dev=hda2 ino=2683359 scontext=system_u:system_r:xdm_t tcontext=system_u:object_r:memory_device_t tclass=chr_file Above is an AVC message reported by a Fedora SE Linux user. It shows that kdm is accessing /dev/mem. I believe that this is the old "use kernel memory as source of random numbers" thing, it should be replaced by use of /dev/random. There is no reason why kdm (or any xdm type program) should directly access /dev/mem. Allowing kdm to access /dev/mem allows it to entirely break the system's security if it is compromised. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: Just run kdm. It's easy to observe on SE Linux, but when not running SE Linux strace should show it. Additional info: