Bug 1140525 - (CVE-2014-3636) CVE-2014-3636 dbus: denial of service by queuing or splitting file descriptors
CVE-2014-3636 dbus: denial of service by queuing or splitting file descriptors
Status: CLOSED WONTFIX
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20140916,reported=2...
: Security
Depends On: 1142581 1142582 1142583
Blocks: 1140534
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Reported: 2014-09-11 03:55 EDT by Murray McAllister
Modified: 2015-01-05 03:35 EST (History)
9 users (show)

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Doc Type: Bug Fix
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Last Closed: 2014-12-12 18:52:03 EST
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Attachments (Terms of Use)
initial patch from upstream (3.56 KB, patch)
2014-09-11 04:34 EDT, Murray McAllister
no flags Details | Diff

  None (edit)
Description Murray McAllister 2014-09-11 03:55:41 EDT
A denial of service flaw was reported in D-Bus's file descriptor passing. A local, malicious user could use this flaw to cause a denial of service (prevent new connections to the bus, or disconnect something from the bus) by queuing up a large number of file descriptors to send, or by splitting a message to allow more file descriptors than expected to be sent.

It is believed that versions 1.3.0 and later are affected.

Acknowledgements:

Red Hat would like to thank D-Bus upstream for reporting this issue. Upstream acknowledges Alban Crequy as the original reporter.
Comment 3 Murray McAllister 2014-09-11 04:34:32 EDT
Created attachment 936437 [details]
initial patch from upstream
Comment 4 Murray McAllister 2014-09-17 01:11:34 EDT
Created dbus tracking bugs for this issue:

Affects: fedora-all [bug 1142581]
Comment 5 Murray McAllister 2014-09-17 01:11:36 EDT
Created mingw-dbus tracking bugs for this issue:

Affects: fedora-all [bug 1142582]
Affects: epel-7 [bug 1142583]
Comment 6 Murray McAllister 2014-09-17 01:16:50 EDT
Public now:

http://www.openwall.com/lists/oss-security/2014/09/16/9
Comment 7 Vincent Danen 2014-12-12 09:30:03 EST
Note that the upstream fix for this was incomplete; please see bug #1173555 (CVE-2014-7824) for the additional patches required to fix this flaw.
Comment 8 Vincent Danen 2014-12-12 18:52:03 EST
To properly fix this issue, the following two patches are also required:

https://bugzilla.redhat.com/attachment.cgi?id=967618
https://bugzilla.redhat.com/attachment.cgi?id=967617

They are what are included with CVE-2014-7824.  However, since we never did provide an update with the faulty patch, we are not vulnerable to that CVE.

Given the Low impact of this issue, we do not intend to fix it at this time.
Comment 9 Fedora Update System 2014-12-13 04:47:33 EST
dbus-1.6.28-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 10 Fedora Update System 2014-12-16 23:46:43 EST
dbus-1.8.12-1.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 11 Fedora Update System 2014-12-19 13:26:24 EST
dbus-1.6.28-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

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