Summary: SELinux is preventing /usr/lib/thunderbird-3.0b4/thunderbird-bin "execmem" access on <Unknown>. Detailed Description: SELinux denied access requested by thunderbird-bin. The current boolean settings do not allow this access. If you have not setup thunderbird-bin to require this access this may signal an intrusion attempt. If you do intend this access you need to change the booleans on this system to allow the access. Allowing Access: One of the following booleans is set incorrectly: allow_execstack, allow_execmem Fix Command: Choose one of the following to allow access: Allow unconfined executables to make their stack executable. This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla") # setsebool -P allow_execstack 1 Allow unconfined executables to map a memory region as both executable and writable, this is dangerous and the executable should be reported in bugzilla") # setsebool -P allow_execmem 1 Additional Information: Source Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1 023 Target Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1 023 Target Objects None [ process ] Source thunderbird-bin Source Path /usr/lib/thunderbird-3.0b4/thunderbird-bin Port <Unknown> Host (removed) Source RPM Packages thunderbird-3.0-3.9.b4.fc12 Target RPM Packages Policy RPM selinux-policy-3.6.32-24.fc12 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Enforcing Plugin Name catchall_boolean Host Name (removed) Platform Linux (removed) 2.6.31.1-56.fc12.i686 #1 SMP Tue Sep 29 16:32:02 EDT 2009 i686 i686 Alert Count 8 First Seen Sun 11 Oct 2009 06:36:28 PM CDT Last Seen Sun 11 Oct 2009 06:36:31 PM CDT Local ID a3cf6a13-f598-483c-9ceb-edbd3f97a261 Line Numbers Raw Audit Messages node=(removed) type=AVC msg=audit(1255304191.306:40004): avc: denied { execmem } for pid=7332 comm="thunderbird-bin" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process node=(removed) type=SYSCALL msg=audit(1255304191.306:40004): arch=40000003 syscall=192 success=no exit=-13 a0=0 a1=2000 a2=7 a3=22 items=0 ppid=7328 pid=7332 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=3 comm="thunderbird-bin" exe="/usr/lib/thunderbird-3.0b4/thunderbird-bin" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null) Hash String generated from selinux-policy-3.6.32-24.fc12,catchall_boolean,thunderbird-bin,unconfined_t,unconfined_t,process,execmem audit2allow suggests: #============= unconfined_t ============== allow unconfined_t self:process execmem;
got avc denial after starting thunderbird for first time after a clean install to fedora 12 rawhide on i686 system
This bug appears to have been reported against 'rawhide' during the Fedora 12 development cycle. Changing version to '12'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Thunderbird is still crashing every time I place the curser in an outgoing message and the comments above suggest the only cures are a security risk. There are no entries for thunderbird in the selinux boolean section and the problem seems critical, since I can't send emails from my preferred client. Are there any proposals for solving this bug? Summary: SELinux is preventing /usr/lib/thunderbird-3.0/thunderbird-bin "execmem" access on <Unknown>. Detailed Description: SELinux denied access requested by thunderbird-bin. The current boolean settings do not allow this access. If you have not setup thunderbird-bin to require this access this may signal an intrusion attempt. If you do intend this access you need to change the booleans on this system to allow the access. Allowing Access: One of the following booleans is set incorrectly: allow_execstack, allow_execmem Fix Command: Choose one of the following to allow access: Allow unconfined executables to make their stack executable. This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla") # setsebool -P allow_execstack 1 Allow unconfined executables to map a memory region as both executable and writable, this is dangerous and the executable should be reported in bugzilla") # setsebool -P allow_execmem 1 Additional Information: Source Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1 023 Target Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1 023 Target Objects None [ process ] Source thunderbird-bin Source Path /usr/lib/thunderbird-3.0/thunderbird-bin Port <Unknown> Host mail1.conditional-fee.co.uk Source RPM Packages thunderbird-3.0.1-1.fc12 Target RPM Packages Policy RPM selinux-policy-3.6.32-89.fc12 Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Plugin Name catchall_boolean Host Name mail.conditional-fee.co.uk Platform Linux mail1.conditional-fee.co.uk 2.6.31.12-174.2.3.fc12.i686.PAE #1 SMP Mon Jan 18 20:06:44 UTC 2010 i686 i686 Alert Count 36 First Seen Thu 25 Feb 2010 11:29:23 GMT Last Seen Thu 25 Feb 2010 11:31:13 GMT Local ID d701827c-5d0c-4f0f-91e0-f30e83b6d124 Line Numbers Raw Audit Messages node=mail.conditional-fee.co.uk type=AVC msg=audit(1267097473.104:49040): avc: denied { execmem } for pid=32254 comm="thunderbird-bin" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process node=mail.conditional-fee.co.uk type=SYSCALL msg=audit(1267097473.104:49040): arch=40000003 syscall=192 success=no exit=-13 a0=0 a1=2000 a2=7 a3=22 items=0 ppid=32237 pid=32254 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="thunderbird-bin" exe="/usr/lib/thunderbird-3.0/thunderbird-bin" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)
You can either change the context of the thunderbird.bin to run with this priv by setting it's context to execmem_exec_t. # semanage fcontext -a -t execmem_exec_t /usr/lib/thunderbird-3.0/thunderbird-bin # restorecon -R -v /usr/lib/thunderbird-3.0 Or you can turn on the allow_execmem or allow_execstack booleans. We have turned these on as the default in F12 updates and F13. There is not more security risk then if you had SELinux disabled.
Many Thanks Daniel, I used the command line option and it seems to have done the trick, incidentally I downloaded all the updates to my system just before I got the last crash so they apparently didn't alter the booleans.
Booleans are never changed on updates, only on initial install.
*** This bug has been marked as a duplicate of bug 528762 ***