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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.0593 Important: kvm security update 8 March 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kvm Publisher: Red Hat Operating System: Red Hat Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-2620 CVE-2017-2615 Reference: ESB-2017.0576 ESB-2017.0555 ESB-2017.0546 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2017-0454.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kvm security update Advisory ID: RHSA-2017:0454-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0454.html Issue date: 2017-03-07 CVE Names: CVE-2017-2615 CVE-2017-2620 ===================================================================== 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): * Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host. (CVE-2017-2615) * Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process. (CVE-2017-2620) Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang (360.cn Inc.) for reporting CVE-2017-2615. 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/): 1418200 - CVE-2017-2615 Qemu: display: cirrus: oob access while doing bitblt copy backward mode 1420484 - CVE-2017-2620 Qemu: display: cirrus: potential arbitrary code execution via cirrus_bitblt_cputovideo 6. Package List: Red Hat Enterprise Linux Desktop Multi OS (v. 5 client): Source: kvm-83-277.el5_11.src.rpm x86_64: kmod-kvm-83-277.el5_11.x86_64.rpm kmod-kvm-debug-83-277.el5_11.x86_64.rpm kvm-83-277.el5_11.x86_64.rpm kvm-debuginfo-83-277.el5_11.x86_64.rpm kvm-qemu-img-83-277.el5_11.x86_64.rpm kvm-tools-83-277.el5_11.x86_64.rpm Red Hat Enterprise Linux Virtualization (v. 5 server): Source: kvm-83-277.el5_11.src.rpm x86_64: kmod-kvm-83-277.el5_11.x86_64.rpm kmod-kvm-debug-83-277.el5_11.x86_64.rpm kvm-83-277.el5_11.x86_64.rpm kvm-debuginfo-83-277.el5_11.x86_64.rpm kvm-qemu-img-83-277.el5_11.x86_64.rpm kvm-tools-83-277.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-2017-2615 https://access.redhat.com/security/cve/CVE-2017-2620 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 2017 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFYvpbiXlSAg2UNWIIRApHSAJ9IfMJsxpXxxdsUI0NFoMcuBYBZtQCfZt2X tHRNJqedRPYZzgtRGRNtzSU= =8TuI - -----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 iQIVAwUBWL9dQYx+lLeg9Ub1AQh64w//YRdl5WMH9kb5dBaKta7zcnoEpYxQCgfT ELA8UiNk3z/guem3PyXzEgSmr3D3be7j/31Or9JnI/U1Iyi1H9tE3iZRXt1rgUDY FqzfrhLy11piyI0/EiUntgDCB2doPb5J9+F+bpu1nETvY4CentI4sjOVFBCfzVRE th8fwq0arXAu/YXtW7Uw7sNVgFywEDhpxzefGY4V3U87QTt9BO5euqLQgxyrYFXv Tjf7EEssZWm7tx6SFjvnoX9pTHru6f/mYptCb3Gr21fxvVLQACHuzoN98e5/IeK6 OXcU+R8hczT8TzcWwhb5tGbol68HTjXTUEhpfNPGTctNbCOi+Hi/ujTvYCAZZv+c UfjSPgARw2LX0FWkiRzDVP2ec3yFaBa4c1Q6NFPSRKj9Z1jRHCF/Fc6Qpe9IUfxw KbZIwAOUIX2toQsA+3N164zMPVjYPA+lcut5qdt3z+GXgIiOPckkWWDmFTtAKZOg bW8s7KAjrX4MOV1OiviCGJ6JCzCPy2x8oXoTUtGRZGKQOd29rhuXQY/tf9RpVlib PkHjJdbhtacmCpS572PWKnAuCGBGzS2wBB4drVHfu/TKms3pUV9sB+uv86ZKG8Vd TCJ/t1uuvhuUtvPJfJsu6Gkd9w6o+YmISaGEuZN4s/hzSCirpdJ9j3nfffNI6n3M vm6iJwPMwWU= =7vG/ -----END PGP SIGNATURE-----