Bug 1144291 (CVE-2014-6054) - CVE-2014-6054 libvncserver: server divide-by-zero flaw in scaling factor handling
Summary: CVE-2014-6054 libvncserver: server divide-by-zero flaw in scaling factor hand...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2014-6054
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: 1145878 1145879 1145880 1145883 1157668 1157669 1157670 1157671 1157674 1157675 1157676 1157677
Blocks: 1144297
TreeView+ depends on / blocked
 
Reported: 2014-09-19 07:39 UTC by Murray McAllister
Modified: 2023-05-12 16:15 UTC (History)
18 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to "0". A remote attacker could use this flaw to crash the VNC server using a malicious VNC client.
Clone Of:
Environment:
Last Closed: 2014-11-11 22:34:04 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2014:1826 0 normal SHIPPED_LIVE Moderate: libvncserver security update 2014-11-11 23:25:37 UTC
Red Hat Product Errata RHSA-2014:1827 0 normal SHIPPED_LIVE Moderate: kdenetwork security update 2014-11-12 02:16:52 UTC

Description Murray McAllister 2014-09-19 07:39:39 UTC 
A divide-by-zero flaw was reported in LibVNCServer's scaling factor handling. A VNC client could use this flaw to cause the VNC server to crash.

Upstream commit:

https://github.com/newsoft/libvncserver/commit/05a9bd41a8ec0a9d580a8f420f41718bdd235446
Comment 2 Murray McAllister 2014-09-24 04:20:04 UTC 
Acknowledgements:

Red Hat would like to thank oCERT for reporting this issue. oCERT acknowledges Nicolas RUFF as the original reporter.
Comment 3 Murray McAllister 2014-09-24 04:21:20 UTC 
Public now:

http://seclists.org/oss-sec/2014/q3/639
Comment 4 Murray McAllister 2014-09-24 04:31:09 UTC 
Created libvncserver tracking bugs for this issue:

Affects: fedora-all [bug 1145878]
Affects: epel-5 [bug 1145879]
Affects: epel-7 [bug 1145880]
Comment 5 Murray McAllister 2014-09-24 04:49:14 UTC 
Created krfb tracking bugs for this issue:

Affects: fedora-all [bug 1145883]
Comment 6 Murray McAllister 2014-09-24 04:51:19 UTC 
krfb advisory:

http://www.kde.org/info/security/advisory-20140923-1.txt
Comment 8 Fedora Update System 2014-09-29 04:06:38 UTC 
libvncserver-0.9.10-0.6.20140718git9453be42.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 9 Fedora Update System 2014-10-01 04:23:33 UTC 
libvncserver-0.9.10-0.6.20140718git9453be42.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 10 Fedora Update System 2014-10-04 03:25:09 UTC 
libvncserver-0.9.10-0.6.20140718git9453be42.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 11 Fedora Update System 2014-10-08 19:11:32 UTC 
krfb-4.11.5-4.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 12 Fedora Update System 2014-10-13 21:38:39 UTC 
libvncserver-0.9.10-0.6.20140718git9453be42.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 16 Martin Prpič 2014-11-10 08:59:06 UTC 
IssueDescription:

A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to "0". A remote attacker could use this flaw to crash the VNC server using a malicious VNC client.
Comment 17 errata-xmlrpc 2014-11-11 18:26:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7

Via RHSA-2014:1826 https://rhn.redhat.com/errata/RHSA-2014-1826.html
Comment 18 errata-xmlrpc 2014-11-11 21:17:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1827 https://rhn.redhat.com/errata/RHSA-2014-1827.html
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