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Red Hat: 2015:0113-01 Moderate: libvncserver Buffer Overflow

red hat
Calendar Grey February 2, 2015
Dist Redhat Esm H88
Oracle has issued a Critical update for MySQL tackling several vulnerabilities. Update immediately to ensure protection!
Updated libvncserver packages that fix two security issues are now available for Red Hat Enterprise Linux 6.5 Extended Update Support

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

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.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow software update moderate threat libvncserver

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

Read the Full Advisory


Advisory ID: RHSA-2015:0113-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:0113.html
Issue date: 2015-02-02

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.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow software update moderate threat libvncserver

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

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