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flathub / im.riot.Riot

https://flathub.org/apps/details/im.riot.Riot
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SELinux issues #458

Open LecrisUT opened 1 month ago

LecrisUT commented 1 month ago

After a recent update of Element, I started having SELinux issues related to execheap.

``` SELinux is preventing element-desktop from using the execheap access on a process. ***** Plugin allow_execheap (53.1 confidence) suggests ******************** If you do not think element-desktop should need to map heap memory that is both writable and executable. Then you need to report a bug. This is a potentially dangerous access. Do contact your security administrator and report this issue. ***** Plugin catchall_boolean (42.6 confidence) suggests ****************** If you want to allow selinuxuser to execheap Then you must tell SELinux about this by enabling the 'selinuxuser_execheap' boolean. Do setsebool -P selinuxuser_execheap 1 ***** Plugin catchall (5.76 confidence) suggests ************************** If you believe that element-desktop should be allowed execheap access on processes labeled unconfined_t 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 'element-desktop' --raw | audit2allow -M my-elementdesktop # semodule -X 300 -i my-elementdesktop.pp Additional Information: Source Context unconfined_u:unconfined_r:unconfined_t:s0- s0:c0.c1023 Target Context unconfined_u:unconfined_r:unconfined_t:s0- s0:c0.c1023 Target Objects Unknown [ process ] Source element-desktop Source Path element-desktop Port Host fedora Source RPM Packages Target RPM Packages SELinux Policy RPM selinux-policy-targeted-40.23-1.fc40.noarch Local Policy RPM selinux-policy-targeted-40.23-1.fc40.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name fedora Platform Linux fedora 6.9.8-200.fc40.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Jul 5 16:20:11 UTC 2024 x86_64 Alert Count 80 First Seen 2024-07-13 10:12:03 CEST Last Seen 2024-07-16 09:19:17 CEST Local ID c95e2487-a0cc-487e-a55a-dff8f3632b88 Raw Audit Messages type=AVC msg=audit(1721114357.832:250): avc: denied { execheap } for pid=3418 comm="element-desktop" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process permissive=0 Hash: element-desktop,unconfined_t,unconfined_t,process,execheap ```

This is similar to the issue https://github.com/flathub/org.zulip.Zulip/issues/74, and similarly I don't know if it's on flatpak packaging or upstream?

SISheogorath commented 1 month ago

This seems to be a general Fedora issue: https://discussion.fedoraproject.org/t/selinux-execheap-denials/120638 (there are some more threads around). There is also a bugzilla ticket for it: https://bugzilla.redhat.com/show_bug.cgi?id=2254434