Bug 1209631 (CVE-2015-1821) - CVE-2015-1821 chrony: Heap out of bound write in address filter
Summary: CVE-2015-1821 chrony: Heap out of bound write in address filter
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2015-1821
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1209633 1209634 1221579
Blocks: 1200382 1210268
TreeView+ depends on / blocked
 
Reported: 2015-04-07 20:45 UTC by Kurt Seifried
Modified: 2023-05-12 14:00 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2015-11-20 05:27:26 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:2241 0 normal SHIPPED_LIVE Moderate: chrony security, bug fix, and enhancement update 2015-11-19 08:59:36 UTC

Description Kurt Seifried 2015-04-07 20:45:21 UTC 
Miroslav Lichvar of Red Hat reports:

When NTP or cmdmon access is configured (from chrony.conf or over
authenticated cmdmon) with a subnet size that is not divisible by 4
and address that has nonzero bits in the 4-bit subnet remainder (e.g.
f0::/3), the TableNode array index is calculated incorrectly and it
may write past the array.
Comment 1 Kurt Seifried 2015-04-07 20:47:20 UTC 
Acknowledgements:

This issue was discovered by Miroslav Lichvár of Red Hat.
Comment 2 Kurt Seifried 2015-04-07 20:49:17 UTC 
Created chrony tracking bugs for this issue:

Affects: epel-all [bug 1209633]
Comment 3 Kurt Seifried 2015-04-07 20:51:33 UTC 
Created chrony tracking bugs for this issue:

Affects: fedora-all [bug 1209634]
Comment 4 Kurt Seifried 2015-04-08 15:59:20 UTC 
This issue was fixed upstream:

http://chrony.tuxfamily.org/News.html

The updated version is available at: 

http://download.tuxfamily.org/chrony/chrony-1.31.1.tar.gz
Comment 5 Fedora Update System 2015-04-22 22:43:00 UTC 
chrony-2.0-0.3.pre2.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2015-04-22 22:53:45 UTC 
chrony-1.31.1-1.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 7 Fedora Update System 2015-04-23 19:00:48 UTC 
chrony-1.31.1-1.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 8 Fedora Update System 2015-04-23 19:02:43 UTC 
chrony-1.31.1-1.el5 has been pushed to the Fedora EPEL 5 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 9 Fedora Update System 2015-04-24 22:49:59 UTC 
chrony-1.31.1-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 12 errata-xmlrpc 2015-11-19 08:30:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2241 https://rhn.redhat.com/errata/RHSA-2015-2241.html
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