ID

VAR-201505-0417

CVE

CVE-2015-3456

TITLE

Xen and KVM Used in QEMU Service disruption in floppy disk controllers in Japan (DoS) Vulnerabilities

DESCRIPTION

The Floppy Disk Controller (FDC) in QEMU, as used in Xen 4.5.x and earlier and KVM, allows local guest users to cause a denial of service (out-of-bounds write and guest crash) or possibly execute arbitrary code via the (1) FD_CMD_READ_ID, (2) FD_CMD_DRIVE_SPECIFICATION_COMMAND, or other unspecified commands, aka VENOM. QEMU is prone to a remote memory-corruption vulnerability because the application fails to perform adequate boundary-checks on user-supplied data. An attacker can exploit this issue to execute arbitrary code within the context of the affected application. Failed exploit attempts may result in a denial-of-service condition. Relevant releases/architectures: RHEV Agents (vdsm) - x86_64 3. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201602-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: QEMU: Multiple vulnerabilities Date: February 04, 2016 Bugs: #544328, #549404, #557206, #558416, #559656, #560422, #560550, #560760, #566792, #567144, #567828, #567868, #568214, #568226, #568246, #569646, #570110, #570988, #571562, #571564, #571566 ID: 201602-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in QEMU, the worst of which may allow a remote attacker to cause a Denial of Service or gain elevated privileges from a guest VM. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-emulation/qemu < 2.5.0-r1 >= 2.5.0-r1 Description =========== Multiple vulnerabilities have been discovered in QEMU. Please review the CVE identifiers referenced below for details. Workaround ========== There is no known workaround at this time. Resolution ========== All QEMU users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-emulation/qemu-2.5.0-r1" References ========== [ 1 ] CVE-2015-1779 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-1779 [ 2 ] CVE-2015-3456 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-3456 [ 3 ] CVE-2015-5225 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-5225 [ 4 ] CVE-2015-5278 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-5278 [ 5 ] CVE-2015-5279 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-5279 [ 6 ] CVE-2015-5745 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-5745 [ 7 ] CVE-2015-6815 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-6815 [ 8 ] CVE-2015-6855 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-6855 [ 9 ] CVE-2015-7295 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7295 [ 10 ] CVE-2015-7504 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7504 [ 11 ] CVE-2015-7512 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7512 [ 12 ] CVE-2015-7549 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7549 [ 13 ] CVE-2015-8345 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8345 [ 14 ] CVE-2015-8504 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8504 [ 15 ] CVE-2015-8556 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8556 [ 16 ] CVE-2015-8558 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8558 [ 17 ] CVE-2015-8567 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8567 [ 18 ] CVE-2015-8568 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8568 [ 19 ] CVE-2015-8666 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8666 [ 20 ] CVE-2015-8701 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8701 [ 21 ] CVE-2015-8743 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8743 [ 22 ] CVE-2015-8744 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8744 [ 23 ] CVE-2015-8745 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8745 [ 24 ] CVE-2016-1568 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1568 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201602-01 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2016 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5 . Background ========== VirtualBox is a powerful virtualization product from Oracle. Relevant releases/architectures: RHEL Desktop Multi OS (v. 5 client) - x86_64 RHEL Virtualization (v. 5 server) - x86_64 3. Note: The procedure in the Solution section must be performed before this update will take effect. 2) Either reboot the hypervisor machine or, as the root user, remove (using "modprobe -r [module]") and reload (using "modprobe [module]") all of the following modules which are currently running (determined using "lsmod"): kvm, ksm, kvm-intel or kvm-amd. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2015:0999-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0999.html Issue date: 2015-05-13 CVE Names: CVE-2015-3456 ===================================================================== 1. Summary: Updated qemu-kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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 ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64 3. Description: KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the user-space component for running virtual machines using KVM. An out-of-bounds memory access flaw was found in the way QEMU's virtual Floppy Disk Controller (FDC) handled FIFO buffer access while processing certain FDC commands. A privileged guest user could use this flaw to crash the guest or, potentially, execute arbitrary code on the host with the privileges of the host's QEMU process corresponding to the guest. (CVE-2015-3456) Red Hat would like to thank Jason Geffner of CrowdStrike for reporting this issue. All qemu-kvm users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. 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. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1218611 - CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: qemu-kvm-1.5.3-86.el7_1.2.src.rpm x86_64: libcacard-1.5.3-86.el7_1.2.i686.rpm libcacard-1.5.3-86.el7_1.2.x86_64.rpm qemu-img-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-common-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-tools-1.5.3-86.el7_1.2.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: libcacard-devel-1.5.3-86.el7_1.2.i686.rpm libcacard-devel-1.5.3-86.el7_1.2.x86_64.rpm libcacard-tools-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): Source: qemu-kvm-1.5.3-86.el7_1.2.src.rpm x86_64: libcacard-1.5.3-86.el7_1.2.i686.rpm libcacard-1.5.3-86.el7_1.2.x86_64.rpm libcacard-devel-1.5.3-86.el7_1.2.i686.rpm libcacard-devel-1.5.3-86.el7_1.2.x86_64.rpm libcacard-tools-1.5.3-86.el7_1.2.x86_64.rpm qemu-img-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-common-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-tools-1.5.3-86.el7_1.2.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: qemu-kvm-1.5.3-86.el7_1.2.src.rpm ppc64: qemu-img-1.5.3-86.el7_1.2.ppc64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.ppc64.rpm x86_64: libcacard-1.5.3-86.el7_1.2.i686.rpm libcacard-1.5.3-86.el7_1.2.x86_64.rpm qemu-img-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-common-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-tools-1.5.3-86.el7_1.2.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): ppc64: libcacard-1.5.3-86.el7_1.2.ppc.rpm libcacard-1.5.3-86.el7_1.2.ppc64.rpm libcacard-devel-1.5.3-86.el7_1.2.ppc.rpm libcacard-devel-1.5.3-86.el7_1.2.ppc64.rpm libcacard-tools-1.5.3-86.el7_1.2.ppc64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.ppc.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.ppc64.rpm x86_64: libcacard-devel-1.5.3-86.el7_1.2.i686.rpm libcacard-devel-1.5.3-86.el7_1.2.x86_64.rpm libcacard-tools-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: qemu-kvm-1.5.3-86.el7_1.2.src.rpm x86_64: libcacard-1.5.3-86.el7_1.2.i686.rpm libcacard-1.5.3-86.el7_1.2.x86_64.rpm qemu-img-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-common-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-tools-1.5.3-86.el7_1.2.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: libcacard-devel-1.5.3-86.el7_1.2.i686.rpm libcacard-devel-1.5.3-86.el7_1.2.x86_64.rpm libcacard-tools-1.5.3-86.el7_1.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.2.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-2015-3456 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 2015 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFVU1swXlSAg2UNWIIRAshIAKCZWkFNWcyvUBOx0PV9ta8YOtLgbgCdFbuw V78Qd9SnhHVz0MTvjdFcFu0= =+Vrr -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . Berrange discovered a denial of service vulnerability in the VNC web socket decoder. CVE-2015-3456 Jason Geffner discovered a buffer overflow in the emulated floppy disk drive, resulting in the potential execution of arbitrary code. For the oldstable distribution (wheezy), these problems have been fixed in version 1.1.2+dfsg-6a+deb7u7 of the qemu source package and in version 1.1.2+dfsg-6+deb7u7 of the qemu-kvm source package. Only CVE-2015-3456 affects oldstable. For the stable distribution (jessie), these problems have been fixed in version 1:2.1+dfsg-12. For the unstable distribution (sid), these problems will be fixed soon. We recommend that you upgrade your qemu packages. ============================================================================ Ubuntu Security Notice USN-2608-1 May 13, 2015 qemu, qemu-kvm vulnerabilities ============================================================================ A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 15.04 - Ubuntu 14.10 - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS Summary: Several security issues were fixed in QEMU. Software Description: - qemu: Machine emulator and virtualizer - qemu-kvm: Machine emulator and virtualizer Details: Jason Geffner discovered that QEMU incorrectly handled the virtual floppy driver. This issue is known as VENOM. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2015-3456) Daniel P. Berrange discovered that QEMU incorrectly handled VNC websockets. A remote attacker could use this issue to cause QEMU to consume memory, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 14.10 and Ubuntu 15.04. (CVE-2015-1779) Jan Beulich discovered that QEMU, when used with Xen, didn't properly restrict access to PCI command registers. A malicious guest could use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-2756) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 15.04: qemu-system 1:2.2+dfsg-5expubuntu9.1 qemu-system-aarch64 1:2.2+dfsg-5expubuntu9.1 qemu-system-arm 1:2.2+dfsg-5expubuntu9.1 qemu-system-mips 1:2.2+dfsg-5expubuntu9.1 qemu-system-misc 1:2.2+dfsg-5expubuntu9.1 qemu-system-ppc 1:2.2+dfsg-5expubuntu9.1 qemu-system-sparc 1:2.2+dfsg-5expubuntu9.1 qemu-system-x86 1:2.2+dfsg-5expubuntu9.1 Ubuntu 14.10: qemu-system 2.1+dfsg-4ubuntu6.6 qemu-system-aarch64 2.1+dfsg-4ubuntu6.6 qemu-system-arm 2.1+dfsg-4ubuntu6.6 qemu-system-mips 2.1+dfsg-4ubuntu6.6 qemu-system-misc 2.1+dfsg-4ubuntu6.6 qemu-system-ppc 2.1+dfsg-4ubuntu6.6 qemu-system-sparc 2.1+dfsg-4ubuntu6.6 qemu-system-x86 2.1+dfsg-4ubuntu6.6 Ubuntu 14.04 LTS: qemu-system 2.0.0+dfsg-2ubuntu1.11 qemu-system-aarch64 2.0.0+dfsg-2ubuntu1.11 qemu-system-arm 2.0.0+dfsg-2ubuntu1.11 qemu-system-mips 2.0.0+dfsg-2ubuntu1.11 qemu-system-misc 2.0.0+dfsg-2ubuntu1.11 qemu-system-ppc 2.0.0+dfsg-2ubuntu1.11 qemu-system-sparc 2.0.0+dfsg-2ubuntu1.11 qemu-system-x86 2.0.0+dfsg-2ubuntu1.11 Ubuntu 12.04 LTS: qemu-kvm 1.0+noroms-0ubuntu14.22 After a standard system update you need to restart all QEMU virtual machines to make all the necessary changes

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

network

TYPE

arbitrary

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2026-02-06T22:45:23.643000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE