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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.2269 Important: kvm security update 28 September 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kvm Publisher: Red Hat Operating System: Red Hat Virtualisation Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2016-5403 CVE-2016-3710 Reference: ESB-2016.2034 ESB-2016.2026 ESB-2016.1155 ESB-2016.1124 ESB-2016.1122 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2016-1943.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kvm security update Advisory ID: RHSA-2016:1943-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1943.html Issue date: 2016-09-27 CVE Names: CVE-2016-3710 CVE-2016-5403 ===================================================================== 1. Summary: An update for kvm is now available for Red Hat Enterprise Linux 5. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Desktop Multi OS (v. 5 client) - x86_64 Red Hat Enterprise Linux Virtualization (v. 5 server) - x86_64 3. Description: KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware. Using KVM, one can run multiple virtual machines running unmodified Linux or Windows images. Each virtual machine has private virtualized hardware: a network card, disk, graphics adapter, etc. Security Fix(es): * An out-of-bounds read/write access flaw was found in the way QEMU's VGA emulation with VESA BIOS Extensions (VBE) support performed read/write operations using I/O port methods. A privileged guest user could use this flaw to execute arbitrary code on the host with the privileges of the host's QEMU process. (CVE-2016-3710) * Quick Emulator(QEMU) built with the virtio framework is vulnerable to an unbounded memory allocation issue. It was found that a malicious guest user could submit more requests than the virtqueue size permits. Processing a request allocates a VirtQueueElement results in unbounded memory allocation on the host controlled by the guest. (CVE-2016-5403) Red Hat would like to thank Wei Xiao (360 Marvel Team) and Qinghao Tang (360 Marvel Team) for reporting CVE-2016-3710 and hongzhenhao (Marvel Team) for reporting CVE-2016-5403. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Note: The procedure in the Solution section must be performed before this update will take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1331401 - CVE-2016-3710 qemu: incorrect banked access bounds checking in vga module 1358359 - CVE-2016-5403 Qemu: virtio: unbounded memory allocation on host via guest leading to DoS 6. Package List: Red Hat Enterprise Linux Desktop Multi OS (v. 5 client): Source: kvm-83-276.el5_11.src.rpm x86_64: kmod-kvm-83-276.el5_11.x86_64.rpm kmod-kvm-debug-83-276.el5_11.x86_64.rpm kvm-83-276.el5_11.x86_64.rpm kvm-debuginfo-83-276.el5_11.x86_64.rpm kvm-qemu-img-83-276.el5_11.x86_64.rpm kvm-tools-83-276.el5_11.x86_64.rpm Red Hat Enterprise Linux Virtualization (v. 5 server): Source: kvm-83-276.el5_11.src.rpm x86_64: kmod-kvm-83-276.el5_11.x86_64.rpm kmod-kvm-debug-83-276.el5_11.x86_64.rpm kvm-83-276.el5_11.x86_64.rpm kvm-debuginfo-83-276.el5_11.x86_64.rpm kvm-qemu-img-83-276.el5_11.x86_64.rpm kvm-tools-83-276.el5_11.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-2016-3710 https://access.redhat.com/security/cve/CVE-2016-5403 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2016 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFX6pksXlSAg2UNWIIRAjT6AKCbdp8zHq3cHFmNd3HvfNOuBoHA9wCdGIcl nghWH7GgFCM4mrWvbUElvRg= =2zya - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBV+sIDYx+lLeg9Ub1AQhARQ//fyqVKXXdQfcZb0ZBtNaM/fAnJDhIGH4V qfJTu37zIJW/qyZN1p6DLt7z5lrHk6CWQsB5l79mFRNzH5nTdQZ1KU5JYzN9Rwlw 1BMUmGfnV5cCps0iwdJHW9AzqNvexXE35EqxJxkSvPYm1xgVuvXyPkiBowX3I/iJ rjOQpv1ziA1PdxyCD4HJWOy2e9o+fM0JOzYPjJOVVgbq99dvRkjbfb6Ujc+tpiMf ohzFOHT7oLEwzmNEzPSlbQxfGNMbFqtcqFzSGlEmRMlPLnEo8/aTqAPs8xOY1JJx JtY7dTOoi06HJro7ZxjIiXPY8VMwLtYKR+Iav53WBQ2zYdb7KsPxN3jHONR1mk2F aFIFUxtC2diWpRRX5H8GbWOM4M3PgXGhK5wc1Rtdrndaii2gohAkJZoDE6Ctg16S gzk4SGfg4Yr4ggKFSuJP5f+CR72lMNMLUO0zs3E74OW3ud/4a/nqwHPDXtC1QeT8 h0XbcMmg0Z1hqegSxIMDZxgUc+pKr/uGJaQ2RHghUcRX2hE+HMeJdU0nrcjwAsgg ahTQfzeHiuepmQy0t7A4at5jhEflkYZ9J859ao68NSmFTn1IwQtp0S6M24jnyrQ8 GxfUGHuF9H8ZjcW5Eklm4v28gh0aSMgHVM6A4d6GbnmvBbORpfxsWrRq5SAW9lQO YS4Jbr86M84= =DvF4 -----END PGP SIGNATURE-----