-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security and bug fix update Advisory ID: RHSA-2017:1430-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2017:1430 Issue date: 2017-06-13 CVE Names: CVE-2017-7718 CVE-2017-7980 ===================================================================== 1. Summary: An update for qemu-kvm is now available for Red Hat Enterprise Linux 7. 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 Client (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 3. Description: Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm package provides the user-space component for running virtual machines that use KVM. Security Fix(es): * An out-of-bounds r/w access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data via various bitblt functions. A privileged user inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process. (CVE-2017-7980) * An out-of-bounds access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data using bitblt functions (for example, cirrus_bitblt_rop_fwd_transp_). A privileged user inside a guest could use this flaw to crash the QEMU process, resulting in denial of service. (CVE-2017-7718) Red Hat would like to thank Jiangxin (PSIRT Huawei Inc) and Li Qiang (Qihoo 360 Gear Team) for reporting CVE-2017-7980 and Jiangxin (PSIRT Huawei Inc) for reporting CVE-2017-7718. Bug Fix(es): * Previously, guest virtual machines in some cases became unresponsive when the "pty" back end of a serial device performed an irregular I/O communication. This update improves the handling of serial I/O on guests, which prevents the described problem from occurring. (BZ#1452332) 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 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1443441 - CVE-2017-7718 Qemu: display: cirrus: OOB read access issue 1444371 - CVE-2017-7980 Qemu: display: cirrus: OOB r/w access issues in bitblt routines 1452332 - RHEL 7.2 based VM (Virtual Machine) hung for several hours apparently waiting for lock held by main_loop 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.9.src.rpm x86_64: qemu-img-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.9.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.9.src.rpm x86_64: qemu-img-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.9.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.9.src.rpm ppc64: qemu-img-1.5.3-126.el7_3.9.ppc64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.9.ppc64.rpm ppc64le: qemu-img-1.5.3-126.el7_3.9.ppc64le.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.9.ppc64le.rpm x86_64: qemu-img-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.9.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.9.src.rpm x86_64: qemu-img-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.9.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.9.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-2017-7718 https://access.redhat.com/security/cve/CVE-2017-7980 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFZP6fHXlSAg2UNWIIRAubAAJ9j8RHimcWGoymiwhlOhRQxJQ7XjwCgvRr8 BEOEg2gWSUTHSW9Y5x6ra0k= =9JZj -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce