Bug 736761 - (CVE-2011-3353) CVE-2011-3353 kernel: fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message
CVE-2011-3353 kernel: fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20110728,repor...
: Security
Depends On: 736764 736765 736766 748690 761366
Blocks: 736769
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Reported: 2011-09-08 11:55 EDT by Petr Matousek
Modified: 2015-02-16 10:52 EST (History)
17 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2012-05-10 09:12:52 EDT
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Description Petr Matousek 2011-09-08 11:55:49 EDT
FUSE_NOTIFY_INVAL_ENTRY didn't check the length of the write so the
message processing could overrun and result in a BUG_ON() in
fuse_copy_fill().

User able to mount FUSE filesystems can use this flaw to crash the
system.

References:
http://permalink.gmane.org/gmane.linux.kernel.commits.head/313266
http://sourceforge.net/mailarchive/forum.php?thread_name=87liut4i7w.fsf%40tucsk.pomaz.szeredi.hu&forum_name=fuse-devel

Upstream fix:
https://github.com/torvalds/linux/commit/c2183d1e9b3f313dd8ba2b1b0197c8d9fb86a7ae
Comment 3 Petr Matousek 2011-09-08 12:03:32 EDT
Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 as they did not provide support for FUSE. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5 as they did not backport the upstream commit 3b463ae0c6264f that introduced this issue. This has been addressed in Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-1465.html and https://rhn.redhat.com/errata/RHSA-2012-0010.html.
Comment 6 Vincent Danen 2011-09-09 19:25:47 EDT
This was assigned the name CVE-2011-3353.
Comment 7 Eugene Teo (Security Response) 2011-10-25 00:06:56 EDT
Created kernel tracking bugs for this issue

Affects: fedora-all [bug 748690]
Comment 8 errata-xmlrpc 2011-11-22 11:50:34 EST
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:1465 https://rhn.redhat.com/errata/RHSA-2011-1465.html
Comment 12 errata-xmlrpc 2012-01-10 15:16:21 EST
This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2012:0010 https://rhn.redhat.com/errata/RHSA-2012-0010.html

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