Red Hat: 2015:0113-01: libvncserver: Moderate Advisory
Summary
LibVNCServer is a library that allows for easy creation of VNC server or
client functionality.
An integer overflow flaw, leading to a heap-based buffer overflow, was
found in the way screen sizes were handled by LibVNCServer. A malicious VNC
server could use this flaw to cause a client to crash or, potentially,
execute arbitrary code in the client. (CVE-2014-6051)
Two stack-based buffer overflow flaws were found in the way LibVNCServer
handled file transfers. A remote attacker could use this flaw to crash the
VNC server using a malicious VNC client. (CVE-2014-6055)
Red Hat would like to thank oCERT for reporting these issues. oCERT
acknowledges Nicolas Ruff as the original reporter.
All libvncserver users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues. All running
applications linked against libvncserver must be restarted for this update
to take effect.
Summary
Solution
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
https://access.redhat.com/articles/11258
References
https://access.redhat.com/security/cve/CVE-2014-6051 https://access.redhat.com/security/cve/CVE-2014-6055 https://access.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Enterprise Linux Server EUS (v. 6.5):
Source:
libvncserver-0.9.7-7.el6_5.1.src.rpm
i386:
libvncserver-0.9.7-7.el6_5.1.i686.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.i686.rpm
ppc64:
libvncserver-0.9.7-7.el6_5.1.ppc64.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.ppc64.rpm
s390x:
libvncserver-0.9.7-7.el6_5.1.s390x.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.s390x.rpm
x86_64:
libvncserver-0.9.7-7.el6_5.1.x86_64.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 6.5):
Source:
libvncserver-0.9.7-7.el6_5.1.src.rpm
i386:
libvncserver-debuginfo-0.9.7-7.el6_5.1.i686.rpm
libvncserver-devel-0.9.7-7.el6_5.1.i686.rpm
ppc64:
libvncserver-0.9.7-7.el6_5.1.ppc.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.ppc.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.ppc64.rpm
libvncserver-devel-0.9.7-7.el6_5.1.ppc.rpm
libvncserver-devel-0.9.7-7.el6_5.1.ppc64.rpm
s390x:
libvncserver-0.9.7-7.el6_5.1.s390.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.s390.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.s390x.rpm
libvncserver-devel-0.9.7-7.el6_5.1.s390.rpm
libvncserver-devel-0.9.7-7.el6_5.1.s390x.rpm
x86_64:
libvncserver-0.9.7-7.el6_5.1.i686.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.i686.rpm
libvncserver-debuginfo-0.9.7-7.el6_5.1.x86_64.rpm
libvncserver-devel-0.9.7-7.el6_5.1.i686.rpm
libvncserver-devel-0.9.7-7.el6_5.1.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
Updated libvncserver packages that fix two security issues are nowavailable for Red Hat Enterprise Linux 6.5 Extended Update Support.Red Hat Product Security has rated this update as having Moderate securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Server EUS (v. 6.5) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 6.5) - i386, ppc64, s390x, x86_64
Bugs Fixed
1144287 - CVE-2014-6051 libvncserver: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling
1144293 - CVE-2014-6055 libvncserver: server stacked-based buffer overflow flaws in file transfer handling