Bug 512605 - selinux policy allows addr 0 mappings by default
selinux policy allows addr 0 mappings by default
Product: Fedora
Classification: Fedora
Component: selinux-policy (Show other bugs)
All Linux
high Severity high
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Assigned To: Daniel Walsh
Fedora Extras Quality Assurance
: Security
Depends On: 511143
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Reported: 2009-07-19 15:18 EDT by Rahul Sundaram
Modified: 2013-03-13 01:45 EDT (History)
14 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Clone Of: 511143
Last Closed: 2009-07-20 16:38:43 EDT
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Description Rahul Sundaram 2009-07-19 15:18:08 EDT
+++ This bug was initially created as a clone of Bug #511143 +++

I have a fix for this in selinux-policy-2.4.6-252.el5

--- Additional comment from eteo@redhat.com on 2009-07-17 06:53:30 EDT ---

The default SELinux policy allows processes in the unconfined domains to map low memory in the kernel. We are updating the selinux-policy package to allow the user to set the allow_unconfined_mmap_low boolean, and to prevent unconfined_t from being able to map low memory in the kernel. No Relabel or Reboot required.
Comment 1 Daniel Walsh 2009-07-20 16:38:43 EDT
Fixed in selinux-policy-3.6.22-2.fc12
Comment 2 Rahul Sundaram 2009-07-20 16:50:18 EDT

I think you should push the policy update to Fedora 11 and Fedora 10 as well.
Comment 3 Daniel Walsh 2009-07-20 21:22:49 EDT
Miroslav is preparing updates for F10 and F11.

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