-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: libvncserver security update Advisory ID: RHSA-2014:1826-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-1826.html Issue date: 2014-11-11 CVE Names: CVE-2014-6051 CVE-2014-6052 CVE-2014-6053 CVE-2014-6054 CVE-2014-6055 ===================================================================== 1. Summary: Updated libvncserver packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server (v. 7) - x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64 3. Description: 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) A NULL pointer dereference flaw was found in LibVNCServer's framebuffer setup. A malicious VNC server could use this flaw to cause a VNC client to crash. (CVE-2014-6052) A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) 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. (CVE-2014-6054) 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. 4. 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 5. Bugs fixed (https://bugzilla.redhat.com/): 1144287 - CVE-2014-6051 libvncserver: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling 1144288 - CVE-2014-6052 libvncserver: NULL pointer dereference flaw in framebuffer setup 1144289 - CVE-2014-6053 libvncserver: server NULL pointer dereference flaw in ClientCutText message handling 1144291 - CVE-2014-6054 libvncserver: server divide-by-zero flaw in scaling factor handling 1144293 - CVE-2014-6055 libvncserver: server stacked-based buffer overflow flaws in file transfer handling 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: libvncserver-0.9.7-7.el6_6.1.src.rpm i386: libvncserver-0.9.7-7.el6_6.1.i686.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.i686.rpm x86_64: libvncserver-0.9.7-7.el6_6.1.x86_64.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.x86_64.rpm Red Hat Enterprise Linux Desktop Optional (v. 6): i386: libvncserver-debuginfo-0.9.7-7.el6_6.1.i686.rpm libvncserver-devel-0.9.7-7.el6_6.1.i686.rpm x86_64: libvncserver-0.9.7-7.el6_6.1.i686.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.i686.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.x86_64.rpm libvncserver-devel-0.9.7-7.el6_6.1.i686.rpm libvncserver-devel-0.9.7-7.el6_6.1.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: libvncserver-0.9.7-7.el6_6.1.src.rpm i386: libvncserver-0.9.7-7.el6_6.1.i686.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.i686.rpm ppc64: libvncserver-0.9.7-7.el6_6.1.ppc64.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.ppc64.rpm s390x: libvncserver-0.9.7-7.el6_6.1.s390x.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.s390x.rpm x86_64: libvncserver-0.9.7-7.el6_6.1.x86_64.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 6): i386: libvncserver-debuginfo-0.9.7-7.el6_6.1.i686.rpm libvncserver-devel-0.9.7-7.el6_6.1.i686.rpm ppc64: libvncserver-0.9.7-7.el6_6.1.ppc.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.ppc.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.ppc64.rpm libvncserver-devel-0.9.7-7.el6_6.1.ppc.rpm libvncserver-devel-0.9.7-7.el6_6.1.ppc64.rpm s390x: libvncserver-0.9.7-7.el6_6.1.s390.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.s390.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.s390x.rpm libvncserver-devel-0.9.7-7.el6_6.1.s390.rpm libvncserver-devel-0.9.7-7.el6_6.1.s390x.rpm x86_64: libvncserver-0.9.7-7.el6_6.1.i686.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.i686.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.x86_64.rpm libvncserver-devel-0.9.7-7.el6_6.1.i686.rpm libvncserver-devel-0.9.7-7.el6_6.1.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: libvncserver-0.9.7-7.el6_6.1.src.rpm i386: libvncserver-0.9.7-7.el6_6.1.i686.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.i686.rpm x86_64: libvncserver-0.9.7-7.el6_6.1.x86_64.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 6): i386: libvncserver-debuginfo-0.9.7-7.el6_6.1.i686.rpm libvncserver-devel-0.9.7-7.el6_6.1.i686.rpm x86_64: libvncserver-0.9.7-7.el6_6.1.i686.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.i686.rpm libvncserver-debuginfo-0.9.7-7.el6_6.1.x86_64.rpm libvncserver-devel-0.9.7-7.el6_6.1.i686.rpm libvncserver-devel-0.9.7-7.el6_6.1.x86_64.rpm Red Hat Enterprise Linux Client (v. 7): Source: libvncserver-0.9.9-9.el7_0.1.src.rpm x86_64: libvncserver-0.9.9-9.el7_0.1.i686.rpm libvncserver-0.9.9-9.el7_0.1.x86_64.rpm libvncserver-debuginfo-0.9.9-9.el7_0.1.i686.rpm libvncserver-debuginfo-0.9.9-9.el7_0.1.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: libvncserver-debuginfo-0.9.9-9.el7_0.1.i686.rpm libvncserver-debuginfo-0.9.9-9.el7_0.1.x86_64.rpm libvncserver-devel-0.9.9-9.el7_0.1.i686.rpm libvncserver-devel-0.9.9-9.el7_0.1.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: libvncserver-0.9.9-9.el7_0.1.src.rpm x86_64: libvncserver-0.9.9-9.el7_0.1.i686.rpm libvncserver-0.9.9-9.el7_0.1.x86_64.rpm libvncserver-debuginfo-0.9.9-9.el7_0.1.i686.rpm libvncserver-debuginfo-0.9.9-9.el7_0.1.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): x86_64: libvncserver-debuginfo-0.9.9-9.el7_0.1.i686.rpm libvncserver-debuginfo-0.9.9-9.el7_0.1.x86_64.rpm libvncserver-devel-0.9.9-9.el7_0.1.i686.rpm libvncserver-devel-0.9.9-9.el7_0.1.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: libvncserver-0.9.9-9.el7_0.1.src.rpm x86_64: libvncserver-0.9.9-9.el7_0.1.i686.rpm libvncserver-0.9.9-9.el7_0.1.x86_64.rpm libvncserver-debuginfo-0.9.9-9.el7_0.1.i686.rpm libvncserver-debuginfo-0.9.9-9.el7_0.1.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: libvncserver-debuginfo-0.9.9-9.el7_0.1.i686.rpm libvncserver-debuginfo-0.9.9-9.el7_0.1.x86_64.rpm libvncserver-devel-0.9.9-9.el7_0.1.i686.rpm libvncserver-devel-0.9.9-9.el7_0.1.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/ 7. References: https://access.redhat.com/security/cve/CVE-2014-6051 https://access.redhat.com/security/cve/CVE-2014-6052 https://access.redhat.com/security/cve/CVE-2014-6053 https://access.redhat.com/security/cve/CVE-2014-6054 https://access.redhat.com/security/cve/CVE-2014-6055 https://access.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2014 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFUYoQeXlSAg2UNWIIRAtoBAJ9oayoOvDSkqllckZMjamQQ4BHWYwCePAL9 1ceSRC7U70bU4Zc3860Ktic= =p1ik -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce