Bug 1815789
| Summary: | SELinux is preventing /usr/libexec/platform-python3.6 from using the dac_override capability. | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 8 | Reporter: | Simon Sekidde <ssekidde> |
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> |
| Status: | CLOSED NOTABUG | QA Contact: | BaseOS QE Security Team <qe-baseos-security> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 8.1 | CC: | lvrabec, mmalik, plautrba, ssekidde |
| Target Milestone: | rc | Keywords: | Triaged |
| Target Release: | 8.0 | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-04-30 14:02:37 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: | |||
Hi Simon, Thank you for reporting the issue. The dac_override permission is requested on an access attempt where DAC permission do not allow this access, the file path is not audited though. Please follow the recommendations of the restorecon plugin to turn on full auditing and when reproduced again, check permissions for the file or directory. ***** Plugin dac_override (91.4 confidence) suggests ********************** If you want to help identify if domain needs this access or you have a file with the wrong permissions on your system Then turn on full auditing to get path information about the offending file and generate the error again. Do Turn on full auditing # auditctl -w /etc/shadow -p w Try to recreate AVC. Then execute # ausearch -m avc -ts recent If you see PATH record check ownership/permissions on file, and fix it, otherwise report as a bugzilla. Simon, Did you manage to check if permissions are correct? If you want us to continue working on this bz, could you provide the requested information or reproducer steps? Zdenek, I am unable to reproduce this issue on a clean OS install. Thanks. |
Description of problem: SELinux is preventing /usr/libexec/platform-python3.6 from using the dac_override capability. Version-Release number of selected component (if applicable): selinux-policy-3.14.3-20.el8.noarch Actual results: SELinux is preventing /usr/libexec/platform-python3.6 from using the dac_override capability. ***** Plugin dac_override (91.4 confidence) suggests ********************** If you want to help identify if domain needs this access or you have a file with the wrong permissions on your system Then turn on full auditing to get path information about the offending file and generate the error again. Do Turn on full auditing # auditctl -w /etc/shadow -p w Try to recreate AVC. Then execute # ausearch -m avc -ts recent If you see PATH record check ownership/permissions on file, and fix it, otherwise report as a bugzilla. ***** Plugin catchall (9.59 confidence) suggests ************************** If you believe that platform-python3.6 should have the dac_override capability by default. Then you should report this as a bug. You can generate a local policy module to allow this access. Do allow this access for now by executing: # ausearch -c 'rhsmd' --raw | audit2allow -M my-rhsmd # semodule -X 300 -i my-rhsmd.pp Additional Information: Source Context system_u:system_r:rhsmcertd_t:s0-s0:c0.c1023 Target Context system_u:system_r:rhsmcertd_t:s0-s0:c0.c1023 Target Objects Unknown [ capability ] Source rhsmd Source Path /usr/libexec/platform-python3.6 Port <Unknown> Host <Unknown> Source RPM Packages platform-python-3.6.8-15.1.el8.x86_64 Target RPM Packages Policy RPM selinux-policy-3.14.3-20.el8.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name localhost.localdomain Platform Linux localhost.localdomain 4.18.0-147.5.1.el8_1.x86_64 #1 SMP Tue Jan 14 15:50:19 UTC 2020 x86_64 x86_64 Alert Count 12 First Seen 2020-03-21 13:28:09 EDT Last Seen 2020-03-21 13:32:23 EDT Local ID 4e23965c-09fd-43d9-b912-c873629743e5 Raw Audit Messages type=AVC msg=audit(1584811943.222:165): avc: denied { dac_override } for pid=8392 comm="rhsmd" capability=1 scontext=system_u:system_r:rhsmcertd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:rhsmcertd_t:s0-s0:c0.c1023 tclass=capability permissive=0 type=SYSCALL msg=audit(1584811943.222:165): arch=x86_64 syscall=openat success=no exit=EACCES a0=ffffff9c a1=7f035e831958 a2=800c1 a3=1a4 items=0 ppid=8391 pid=8392 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=rhsmd exe=/usr/libexec/platform-python3.6 subj=system_u:system_r:rhsmcertd_t:s0-s0:c0.c1023 key=(null)ARCH=x86_64 SYSCALL=openat AUID=unset UID=root GID=root EUID=root SUID=root FSUID=root EGID=root SGID=root FSGID=root Hash: rhsmd,rhsmcertd_t,rhsmcertd_t,capability,dac_override