FreeBSD 'devfs' and 'VFS' Interaction NULL Pointer Dereference Vulnerability

BID:36587

Info

FreeBSD 'devfs' and 'VFS' Interaction NULL Pointer Dereference Vulnerability

Bugtraq ID: 36587
Class: Race Condition Error
CVE:
Remote: No
Local: Yes
Published: Oct 02 2009 12:00AM
Updated: Oct 16 2009 03:48PM
Credit: Przemyslaw Frasunek
Vulnerable: FreeBSD FreeBSD 6.0 .x
FreeBSD FreeBSD 6.0 -STABLE
FreeBSD FreeBSD 6.0 -RELEASE
FreeBSD FreeBSD 7.2-STABLE
FreeBSD FreeBSD 7.2-RELEASE-p1
FreeBSD FreeBSD 7.2-RC2
FreeBSD FreeBSD 7.2-PRERELEASE
FreeBSD FreeBSD 7.1-STABLE
FreeBSD FreeBSD 7.1-RELEASE-p6
FreeBSD FreeBSD 7.1-RELEASE-p5
FreeBSD FreeBSD 7.1-RELEASE-p4
FreeBSD FreeBSD 7.1 -RELEASE-p2
FreeBSD FreeBSD 7.1 -RELEASE-p1
FreeBSD FreeBSD 7.1 -PRE-RELEASE
FreeBSD FreeBSD 7.0-STABLE
FreeBSD FreeBSD 7.0-RELEASE-p8
FreeBSD FreeBSD 7.0-RELEASE-p12
FreeBSD FreeBSD 7.0-RELEASE-p11
FreeBSD FreeBSD 7.0-RELEASE-p11
FreeBSD FreeBSD 7.0-RELEASE
FreeBSD FreeBSD 7.0 BETA4
FreeBSD FreeBSD 7.0 -RELENG
FreeBSD FreeBSD 7.0 -RELEASE-p9
FreeBSD FreeBSD 7.0 -PRERELEASE
FreeBSD FreeBSD 7.0
FreeBSD FreeBSD 6.4-RELENG
FreeBSD FreeBSD 6.4-RELEASE-p5
FreeBSD FreeBSD 6.4-RELEASE-p4
FreeBSD FreeBSD 6.4-RELEASE-p2
FreeBSD FreeBSD 6.4 -STABLE
FreeBSD FreeBSD 6.4 -RELEASE-p3
FreeBSD FreeBSD 6.4 -RELEASE
FreeBSD FreeBSD 6.3-RELEASE-p11
FreeBSD FreeBSD 6.3-RELEASE-p10
FreeBSD FreeBSD 6.3 -RELENG
FreeBSD FreeBSD 6.3 -RELEASE-p9
FreeBSD FreeBSD 6.3 -RELEASE-p8
FreeBSD FreeBSD 6.3 -RELEASE-p6
FreeBSD FreeBSD 6.3
FreeBSD FreeBSD 6.2 -STABLE
FreeBSD FreeBSD 6.2 -RELENG
FreeBSD FreeBSD 6.2
FreeBSD FreeBSD 6.1 -STABLE
FreeBSD FreeBSD 6.1 -RELEASE-p10
FreeBSD FreeBSD 6.1 -RELEASE
FreeBSD FreeBSD 6.1
FreeBSD FreeBSD 6.0-RELENG
FreeBSD FreeBSD 6.0 -RELEASE-p5
Not Vulnerable:

Discussion

FreeBSD 'devfs' and 'VFS' Interaction NULL Pointer Dereference Vulnerability

FreeBSD is prone to a local NULL-pointer dereference vulnerability.

A local attacker can exploit this issue to execute arbitrary code with superuser privileges or crash an affected kernel, denying service to legitimate users.

The following are vulnerable:

FreeBSD 6.4 and prior
FreeBSD 7.2 and prior

Exploit / POC

FreeBSD 'devfs' and 'VFS' Interaction NULL Pointer Dereference Vulnerability

The following exploit code is available:

Solution / Fix

FreeBSD 'devfs' and 'VFS' Interaction NULL Pointer Dereference Vulnerability

Solution:
The vendor has released an advisory and updates. Please see the references for details.


FreeBSD FreeBSD 7.0-RELEASE-p12

FreeBSD FreeBSD 6.3

FreeBSD FreeBSD 6.1 -RELEASE

FreeBSD FreeBSD 6.4-RELEASE-p5

FreeBSD FreeBSD 7.0-STABLE

FreeBSD FreeBSD 6.3 -RELEASE-p8

FreeBSD FreeBSD 7.0 -RELEASE-p9

FreeBSD FreeBSD 6.4 -RELEASE-p3

FreeBSD FreeBSD 6.1 -STABLE

FreeBSD FreeBSD 6.3-RELEASE-p11

FreeBSD FreeBSD 6.3-RELEASE-p10

FreeBSD FreeBSD 7.1-RELEASE-p6

FreeBSD FreeBSD 7.0

FreeBSD FreeBSD 7.0-RELEASE

FreeBSD FreeBSD 7.1-RELEASE-p4

FreeBSD FreeBSD 6.2

FreeBSD FreeBSD 6.1

FreeBSD FreeBSD 6.1 -RELEASE-p10

FreeBSD FreeBSD 7.0 -PRERELEASE

FreeBSD FreeBSD 7.2-STABLE

FreeBSD FreeBSD 7.0-RELEASE-p11

FreeBSD FreeBSD 6.0 -RELEASE-p5

FreeBSD FreeBSD 7.2-RC2

FreeBSD FreeBSD 7.1 -PRE-RELEASE

FreeBSD FreeBSD 7.0-RELEASE-p8

FreeBSD FreeBSD 6.4 -STABLE

FreeBSD FreeBSD 6.4-RELENG

FreeBSD FreeBSD 6.0-RELENG

FreeBSD FreeBSD 6.3 -RELEASE-p6

FreeBSD FreeBSD 7.0 BETA4

FreeBSD FreeBSD 6.2 -STABLE

FreeBSD FreeBSD 7.1-STABLE

FreeBSD FreeBSD 7.2-RELEASE-p1

FreeBSD FreeBSD 6.4 -RELEASE

FreeBSD FreeBSD 6.4-RELEASE-p4

FreeBSD FreeBSD 7.2-PRERELEASE

FreeBSD FreeBSD 6.4-RELEASE-p2

FreeBSD FreeBSD 6.3 -RELENG

FreeBSD FreeBSD 7.1-RELEASE-p5

FreeBSD FreeBSD 6.2 -RELENG

FreeBSD FreeBSD 7.1 -RELEASE-p1

FreeBSD FreeBSD 6.3 -RELEASE-p9

FreeBSD FreeBSD 7.1 -RELEASE-p2

FreeBSD FreeBSD 7.0-RELEASE-p11

FreeBSD FreeBSD 7.0 -RELENG

FreeBSD FreeBSD 6.0 -RELEASE

FreeBSD FreeBSD 6.0 -STABLE

FreeBSD FreeBSD 6.0 .x

References

FreeBSD 'devfs' and 'VFS' Interaction NULL Pointer Dereference Vulnerability

References:

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