Bug 526333 - setroubleshoot: Your system may be seriously compromised! /bin/dbus-daemon attempted to mmap low kernel memory.
Summary: setroubleshoot: Your system may be seriously compromised! /bin/dbus-daem...
Keywords:
Status: CLOSED DUPLICATE of bug 525537
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: rawhide
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Eric Paris
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: setroubleshoot_trace_hash:afcba5d89af...
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-09-29 20:27 UTC by Nicolas Mailhot
Modified: 2009-10-05 14:11 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2009-10-05 14:11:59 UTC


Attachments (Terms of Use)

Description Nicolas Mailhot 2009-09-29 20:27:21 UTC
The following was filed automatically by setroubleshoot:

Résumé:

Your system may be seriously compromised! /bin/dbus-daemon attempted to mmap low
kernel memory.

Description détaillée:

[dbus-daemon has a permissive type (system_dbusd_t). This access was not
denied.]

SELinux has denied the dbus-daemon the ability to mmap low area of the kernel
address space. The ability to mmap a low area of the address space, as
configured by /proc/sys/kernel/mmap_min_addr. Preventing such mappings helps
protect against exploiting null deref bugs in the kernel. All applications that
need this access should have already had policy written for them. If a
compromised application tries modify the kernel this AVC would be generated.
This is a serious issue. Your system may very well be compromised.

Autoriser l'accès:

Contact your security administrator and report this issue.

Informations complémentaires:

Contexte source               system_u:system_r:system_dbusd_t:s0-s0:c0.c1023
Contexte cible                system_u:system_r:system_dbusd_t:s0-s0:c0.c1023
Objets du contexte            None [ memprotect ]
source                        dbus-daemon
Chemin de la source           /bin/dbus-daemon
Port                          <Inconnu>
Hôte                         (removed)
Paquetages RPM source         dbus-1.2.16-5.fc12
Paquetages RPM cible          
Politique RPM                 selinux-policy-3.6.32-11.fc12
Selinux activé               True
Type de politique             targeted
MLS activé                   True
Mode strict                   Enforcing
Nom du plugin                 mmap_zero
Nom de l'hôte                (removed)
Plateforme                    Linux (removed) 2.6.31.1-48.fc12.x86_64 #1 SMP Fri
                              Sep 25 16:57:40 EDT 2009 x86_64 x86_64
Compteur d'alertes            6
Première alerte              mar. 29 sept. 2009 19:50:03 CEST
Dernière alerte              mar. 29 sept. 2009 19:50:03 CEST
ID local                      9bbf1488-caac-47a0-837a-d077b59ea021
Numéros des lignes           

Messages d'audit bruts        

node=(removed) type=AVC msg=audit(1254246603.310:9): avc:  denied  { mmap_zero } for  pid=1292 comm="dbus-daemon" scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tclass=memprotect

node=(removed) type=AVC msg=audit(1254246603.310:9): avc:  denied  { mmap_zero } for  pid=1292 comm="dbus-daemon" scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tclass=memprotect

node=(removed) type=AVC msg=audit(1254246603.310:9): avc:  denied  { mmap_zero } for  pid=1292 comm="dbus-daemon" scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tclass=memprotect

node=(removed) type=SYSCALL msg=audit(1254246603.310:9): arch=c000003e syscall=125 success=yes exit=0 a0=7fff55422f64 a1=0 a2=7fff5268ee80 a3=7fff0cd03ce0 items=0 ppid=1 pid=1292 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="dbus-daemon" exe="/bin/dbus-daemon" subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-11.fc12,mmap_zero,dbus-daemon,system_dbusd_t,system_dbusd_t,memprotect,mmap_zero
audit2allow suggests:

#============= system_dbusd_t ==============
allow system_dbusd_t self:memprotect mmap_zero;

Comment 1 Eric Paris 2009-10-05 14:11:59 UTC

*** This bug has been marked as a duplicate of bug 525537 ***


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