Bug 1560986
| Summary: | RFE: SELinux boolean to allow antivirus_t to read /proc | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Zdenek Pytela <zpytela> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.4 | CC: | lvrabec, mgrepl, mmalik, mthacker, plautrba, ralston, ssekidde |
| Target Milestone: | rc | Keywords: | FutureFeature |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-203.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-10-30 10:03:16 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: | |||
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:3111 |
Description of problem: The Clam Antivirus daemon, clamd, can use the fanotify(7) interface to allow malware scans to be triggered dynamically, as files are accessed. clamd provides a configuration option, OnAccessExcludeUID, to exempt certain users from on-access antivirus scanning. To implement this, clamd looks at the pid field of the fanotify_event_metadata structure, and calls stat() on /proc/PID. If the stat() call succeeds, clamd then checks whether the stat.uid_t value matches any uid that clamd was told to exclude from on-access scanning. If clamd finds a match, it takes no further action; if it doesn't find a match, it performs a scan of the file that was accessed. At the moment, the SELinux targeted policy prevents clamd from calling stat() on arbitrary pids in /proc: [pid 1234] stat("/proc/5678", 0x7f81768785a0) = -1 EACCES (Permission denied) A new boolean which would allow system administrators to grant the getattr permission on domains is requested to accomplish the feature. Version-Release number of selected component (if applicable): selinux-policy-3.13.1-166.el7_4.7 How reproducible: always Steps to Reproduce: 1. install clamav-server 2. turn OnAccessExcludeUID on Actual results: Permission denied when accessing directories in /proc Expected results: No permission denied Additional info: The selinux policy currently contains a dontaudit rule: dontaudit antivirus_domain domain : dir { ioctl read getattr lock search open } ;