VAR-201505-0417
Vulnerability from variot - Updated: 2026-04-10 22:57The 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:
Red Hat Enterprise Linux HPC Node EUS (v. 6.5) - i386, x86_64
- After installing this update, shut down all running virtual machines. Relevant releases/architectures:
RHEV Agents (vdsm) - x86_64
-
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
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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. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Note: the current version of the following document is available here: https://h20564.www2.hp.com/portal/site/hpsc/public/kb/ docDisplay?docId=emr_na-c04706564
SUPPORT COMMUNICATION - SECURITY BULLETIN
Document ID: c04706564 Version: 1
HPSBMU03349 rev.1- HP Helion CloudSystem, Local Denial of Service (DoS), Arbitrary Code Execution
NOTICE: The information in this Security Bulletin should be acted upon as soon as possible.
Release Date: 2015-06-09 Last Updated: 2015-06-09
Potential Security Impact: Local Denial of Service (DoS), arbitrary code execution
Source: Hewlett-Packard Company, HP Software Security Response Team
VULNERABILITY SUMMARY A potential security vulnerability has been identified with HP Helion CloudSystem. The vulnerability could be exploited locally resulting in Denial of Service (DoS) or execution of arbitrary code.
Notes:
This is the vulnerability known as "Virtual Environment Neglected Operations Manipulation" also known as "VENOM". This vulnerability exists in the floppy disk controller driver of QEMU, an open-source virtualization technology used to provision guest Virtual Machines. This vulnerability affects all versions of QEMU and could lead to hypervisor breakout, where a user of the guest VM can gain control of the host. HP Helion CloudSystem leverages QEMU as a core part of its virtualization functionality and is therefore affected by this vulnerability.
References:
CVE-2015-3456 (SSRT102076)
SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP Helion CloudSystem software:
HP Helion CloudSystem 8.x series
Note: Only HP CloudSystem deployment using KVM on RHEL version 6.4 or 6.5 in the control plane or the data plane are affected by this vulnerability
BACKGROUND
CVSS 2.0 Base Metrics
Reference Base Vector Base Score CVE-2015-3456 (AV:A/AC:L/Au:S/C:C/I:C/A:C) 7.7 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002
RESOLUTION
HP recommends following remediation steps to resolve the vulnerability in HP Helion CloudSystem.
The following steps are recommended by Red Hat ( https://access.redhat.com/articles/1444903 ) and must be applied for each control plane and data plane node that is using KVM for virtualization:
Login to the node
Upgrade the QEMU package for your system using the command: 'yum update qemu-kvm'. A full system update may be applied using the command 'yum update'. Refer to the HP Helion CloudSystem administrative guide ( http://h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay/?docI d=c04376928 ) for instructions on restarting appliances.
HISTORY Version:1 (rev.1) - 9 June 2015 Initial release
Third Party Security Patches: Third party security patches that are to be installed on systems running HP software products should be applied in accordance with the customer's patch management policy.
Support: For issues about implementing the recommendations of this Security Bulletin, contact normal HP Services support channel. For other issues about the content of this Security Bulletin, send e-mail to security-alert@hp.com.
Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@hp.com
Subscribe: To initiate a subscription to receive future HP Security Bulletin alerts via Email: http://h41183.www4.hp.com/signup_alerts.php?jumpid=hpsc_secbulletins
Security Bulletin Archive: A list of recently released Security Bulletins is available here: https://h20564.www2.hp.com/portal/site/hpsc/public/kb/secBullArchive/
Software Product Category: The Software Product Category is represented in the title by the two characters following HPSB.
3C = 3COM 3P = 3rd Party Software GN = HP General Software HF = HP Hardware and Firmware MP = MPE/iX MU = Multi-Platform Software NS = NonStop Servers OV = OpenVMS PI = Printing and Imaging PV = ProCurve ST = Storage Software TU = Tru64 UNIX UX = HP-UX
Copyright 2015 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HP or its affiliates, subcontractors or suppliers will be liable for incidental,special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of Hewlett-Packard products referenced herein are trademarks of Hewlett-Packard Company in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
===================================================================== Red Hat Security Advisory
Synopsis: Important: kvm security update Advisory ID: RHSA-2015:1003-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1003.html Issue date: 2015-05-13 CVE Names: CVE-2015-3456 =====================================================================
- Summary:
Updated kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 5.
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.
- Relevant releases/architectures:
RHEL Desktop Multi OS (v. 5 client) - x86_64 RHEL Virtualization (v. 5 server) - x86_64
- Description:
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems.
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 kvm users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. Note: The procedure in the Solution section must be performed before this update will take effect.
- 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
The following procedure must be performed before this update will take effect:
1) Stop all KVM guest virtual machines.
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.
3) Restart the KVM guest virtual machines.
- Bugs fixed (https://bugzilla.redhat.com/):
1218611 - CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access
- Package List:
RHEL Desktop Multi OS (v. 5 client):
Source: kvm-83-272.el5_11.src.rpm
x86_64: kmod-kvm-83-272.el5_11.x86_64.rpm kmod-kvm-debug-83-272.el5_11.x86_64.rpm kvm-83-272.el5_11.x86_64.rpm kvm-debuginfo-83-272.el5_11.x86_64.rpm kvm-qemu-img-83-272.el5_11.x86_64.rpm kvm-tools-83-272.el5_11.x86_64.rpm
RHEL Virtualization (v. 5 server):
Source: kvm-83-272.el5_11.src.rpm
x86_64: kmod-kvm-83-272.el5_11.x86_64.rpm kmod-kvm-debug-83-272.el5_11.x86_64.rpm kvm-83-272.el5_11.x86_64.rpm kvm-debuginfo-83-272.el5_11.x86_64.rpm kvm-qemu-img-83-272.el5_11.x86_64.rpm kvm-tools-83-272.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/
- References:
https://access.redhat.com/security/cve/CVE-2015-3456 https://access.redhat.com/security/updates/classification/#important
- 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
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-- 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.
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
Show details on source website{
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"_id": null,
"data": "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. \nAn 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:\n\nRed Hat Enterprise Linux HPC Node EUS (v. 6.5) - i386, x86_64\n\n3. After installing this\nupdate, shut down all running virtual machines. Relevant releases/architectures:\n\nRHEV Agents (vdsm) - x86_64\n\n3. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\nGentoo Linux Security Advisory GLSA 201602-01\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n https://security.gentoo.org/\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\n Severity: Normal\n Title: QEMU: Multiple vulnerabilities\n Date: February 04, 2016\n Bugs: #544328, #549404, #557206, #558416, #559656, #560422,\n #560550, #560760, #566792, #567144, #567828, #567868,\n #568214, #568226, #568246, #569646, #570110, #570988,\n #571562, #571564, #571566\n ID: 201602-01\n\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\nSynopsis\n========\n\nMultiple vulnerabilities have been found in QEMU, the worst of which\nmay allow a remote attacker to cause a Denial of Service or gain\nelevated privileges from a guest VM. \n\nAffected packages\n=================\n\n -------------------------------------------------------------------\n Package / Vulnerable / Unaffected\n -------------------------------------------------------------------\n 1 app-emulation/qemu \u003c 2.5.0-r1 \u003e= 2.5.0-r1\n\nDescription\n===========\n\nMultiple vulnerabilities have been discovered in QEMU. Please review\nthe CVE identifiers referenced below for details. \n\nWorkaround\n==========\n\nThere is no known workaround at this time. \n\nResolution\n==========\n\nAll QEMU users should upgrade to the latest version:\n\n # emerge --sync\n # emerge --ask --oneshot --verbose \"\u003e=app-emulation/qemu-2.5.0-r1\"\n\nReferences\n==========\n\n[ 1 ] CVE-2015-1779\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-1779\n[ 2 ] CVE-2015-3456\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-3456\n[ 3 ] CVE-2015-5225\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-5225\n[ 4 ] CVE-2015-5278\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-5278\n[ 5 ] CVE-2015-5279\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-5279\n[ 6 ] CVE-2015-5745\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-5745\n[ 7 ] CVE-2015-6815\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-6815\n[ 8 ] CVE-2015-6855\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-6855\n[ 9 ] CVE-2015-7295\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7295\n[ 10 ] CVE-2015-7504\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7504\n[ 11 ] CVE-2015-7512\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7512\n[ 12 ] CVE-2015-7549\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7549\n[ 13 ] CVE-2015-8345\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8345\n[ 14 ] CVE-2015-8504\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8504\n[ 15 ] CVE-2015-8556\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8556\n[ 16 ] CVE-2015-8558\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8558\n[ 17 ] CVE-2015-8567\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8567\n[ 18 ] CVE-2015-8568\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8568\n[ 19 ] CVE-2015-8666\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8666\n[ 20 ] CVE-2015-8701\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8701\n[ 21 ] CVE-2015-8743\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8743\n[ 22 ] CVE-2015-8744\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8744\n[ 23 ] CVE-2015-8745\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8745\n[ 24 ] CVE-2016-1568\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1568\n\nAvailability\n============\n\nThis GLSA and any updates to it are available for viewing at\nthe Gentoo Security Website:\n\n https://security.gentoo.org/glsa/201602-01\n\nConcerns?\n=========\n\nSecurity is a primary focus of Gentoo Linux and ensuring the\nconfidentiality and security of our users\u0027 machines is of utmost\nimportance to us. Any security concerns should be addressed to\nsecurity@gentoo.org or alternatively, you may file a bug at\nhttps://bugs.gentoo.org. \n\nLicense\n=======\n\nCopyright 2016 Gentoo Foundation, Inc; referenced text\nbelongs to its owner(s). \n\nThe contents of this document are licensed under the\nCreative Commons - Attribution / Share Alike license. \n\nhttp://creativecommons.org/licenses/by-sa/2.5\n. \n\nBackground\n==========\n\nVirtualBox is a powerful virtualization product from Oracle. -----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA1\n\nNote: the current version of the following document is available here:\nhttps://h20564.www2.hp.com/portal/site/hpsc/public/kb/\ndocDisplay?docId=emr_na-c04706564\n\nSUPPORT COMMUNICATION - SECURITY BULLETIN\n\nDocument ID: c04706564\nVersion: 1\n\nHPSBMU03349 rev.1- HP Helion CloudSystem, Local Denial of Service (DoS),\nArbitrary Code Execution\n\nNOTICE: The information in this Security Bulletin should be acted upon as\nsoon as possible. \n\nRelease Date: 2015-06-09\nLast Updated: 2015-06-09\n\nPotential Security Impact: Local Denial of Service (DoS), arbitrary code\nexecution\n\nSource: Hewlett-Packard Company, HP Software Security Response Team\n\nVULNERABILITY SUMMARY\nA potential security vulnerability has been identified with HP Helion\nCloudSystem. The vulnerability could be exploited locally resulting in Denial\nof Service (DoS) or execution of arbitrary code. \n\nNotes:\n\nThis is the vulnerability known as \"Virtual Environment Neglected Operations\nManipulation\" also known as \"VENOM\". \nThis vulnerability exists in the floppy disk controller driver of QEMU, an\nopen-source virtualization technology used to provision guest Virtual\nMachines. \nThis vulnerability affects all versions of QEMU and could lead to hypervisor\nbreakout, where a user of the guest VM can gain control of the host. HP\nHelion CloudSystem leverages QEMU as a core part of its virtualization\nfunctionality and is therefore affected by this vulnerability. \n\nReferences:\n\nCVE-2015-3456 (SSRT102076)\n\nSUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. \nHP Helion CloudSystem software:\n\nHP Helion CloudSystem 8.x series\n\nNote: Only HP CloudSystem deployment using KVM on RHEL version 6.4 or 6.5 in\nthe control plane or the data plane are affected by this vulnerability\n\nBACKGROUND\n\nCVSS 2.0 Base Metrics\n===========================================================\n Reference Base Vector Base Score\nCVE-2015-3456 (AV:A/AC:L/Au:S/C:C/I:C/A:C) 7.7\n===========================================================\n Information on CVSS is documented\n in HP Customer Notice: HPSN-2008-002\n\nRESOLUTION\n\nHP recommends following remediation steps to resolve the vulnerability in HP\nHelion CloudSystem. \n\nThe following steps are recommended by Red Hat (\nhttps://access.redhat.com/articles/1444903 ) and must be applied for each\ncontrol plane and data plane node that is using KVM for virtualization:\n\nLogin to the node\n\nUpgrade the QEMU package for your system using the command: \u0027yum update\nqemu-kvm\u0027. A full system update may be applied using the command \u0027yum\nupdate\u0027. Refer to the HP Helion CloudSystem administrative\nguide ( http://h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay/?docI\nd=c04376928 ) for instructions on restarting appliances. \n\nHISTORY\nVersion:1 (rev.1) - 9 June 2015 Initial release\n\nThird Party Security Patches: Third party security patches that are to be\ninstalled on systems running HP software products should be applied in\naccordance with the customer\u0027s patch management policy. \n\nSupport: For issues about implementing the recommendations of this Security\nBulletin, contact normal HP Services support channel. For other issues about\nthe content of this Security Bulletin, send e-mail to security-alert@hp.com. \n\nReport: To report a potential security vulnerability with any HP supported\nproduct, send Email to: security-alert@hp.com\n\nSubscribe: To initiate a subscription to receive future HP Security Bulletin\nalerts via Email:\nhttp://h41183.www4.hp.com/signup_alerts.php?jumpid=hpsc_secbulletins\n\nSecurity Bulletin Archive: A list of recently released Security Bulletins is\navailable here:\nhttps://h20564.www2.hp.com/portal/site/hpsc/public/kb/secBullArchive/\n\nSoftware Product Category: The Software Product Category is represented in\nthe title by the two characters following HPSB. \n\n3C = 3COM\n3P = 3rd Party Software\nGN = HP General Software\nHF = HP Hardware and Firmware\nMP = MPE/iX\nMU = Multi-Platform Software\nNS = NonStop Servers\nOV = OpenVMS\nPI = Printing and Imaging\nPV = ProCurve\nST = Storage Software\nTU = Tru64 UNIX\nUX = HP-UX\n\nCopyright 2015 Hewlett-Packard Development Company, L.P. \nHewlett-Packard Company shall not be liable for technical or editorial errors\nor omissions contained herein. The information provided is provided \"as is\"\nwithout warranty of any kind. To the extent permitted by law, neither HP or\nits affiliates, subcontractors or suppliers will be liable for\nincidental,special or consequential damages including downtime cost; lost\nprofits; damages relating to the procurement of substitute products or\nservices; or damages for loss of data, or software restoration. The\ninformation in this document is subject to change without notice. \nHewlett-Packard Company and the names of Hewlett-Packard products referenced\nherein are trademarks of Hewlett-Packard Company in the United States and\nother countries. Other product and company names mentioned herein may be\ntrademarks of their respective owners. -----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA1\n\n=====================================================================\n Red Hat Security Advisory\n\nSynopsis: Important: kvm security update\nAdvisory ID: RHSA-2015:1003-01\nProduct: Red Hat Enterprise Linux\nAdvisory URL: https://rhn.redhat.com/errata/RHSA-2015-1003.html\nIssue date: 2015-05-13\nCVE Names: CVE-2015-3456 \n=====================================================================\n\n1. Summary:\n\nUpdated kvm packages that fix one security issue are now available for Red\nHat Enterprise Linux 5. \n\nRed Hat Product Security has rated this update as having Important security\nimpact. A Common Vulnerability Scoring System (CVSS) base score, which\ngives a detailed severity rating, is available from the CVE link in the\nReferences section. \n\n2. Relevant releases/architectures:\n\nRHEL Desktop Multi OS (v. 5 client) - x86_64\nRHEL Virtualization (v. 5 server) - x86_64\n\n3. Description:\n\nKVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on AMD64 and Intel 64 systems. \n\nAn out-of-bounds memory access flaw was found in the way QEMU\u0027s virtual\nFloppy Disk Controller (FDC) handled FIFO buffer access while processing\ncertain FDC commands. A privileged guest user could use this flaw to crash\nthe guest or, potentially, execute arbitrary code on the host with the\nprivileges of the host\u0027s QEMU process corresponding to the guest. \n(CVE-2015-3456)\n\nRed Hat would like to thank Jason Geffner of CrowdStrike for reporting\nthis issue. \n\nAll kvm users are advised to upgrade to these updated packages, which\ncontain a backported patch to correct this issue. Note: The procedure in\nthe Solution section must be performed before this update will take effect. \n\n4. Solution:\n\nBefore applying this update, make sure all previously released errata\nrelevant to your system have been applied. \n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe following procedure must be performed before this update will take\neffect:\n\n1) Stop all KVM guest virtual machines. \n\n2) Either reboot the hypervisor machine or, as the root user, remove (using\n\"modprobe -r [module]\") and reload (using \"modprobe [module]\") all of the\nfollowing modules which are currently running (determined using \"lsmod\"):\nkvm, ksm, kvm-intel or kvm-amd. \n\n3) Restart the KVM guest virtual machines. \n\n5. Bugs fixed (https://bugzilla.redhat.com/):\n\n1218611 - CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access\n\n6. Package List:\n\nRHEL Desktop Multi OS (v. 5 client):\n\nSource:\nkvm-83-272.el5_11.src.rpm\n\nx86_64:\nkmod-kvm-83-272.el5_11.x86_64.rpm\nkmod-kvm-debug-83-272.el5_11.x86_64.rpm\nkvm-83-272.el5_11.x86_64.rpm\nkvm-debuginfo-83-272.el5_11.x86_64.rpm\nkvm-qemu-img-83-272.el5_11.x86_64.rpm\nkvm-tools-83-272.el5_11.x86_64.rpm\n\nRHEL Virtualization (v. 5 server):\n\nSource:\nkvm-83-272.el5_11.src.rpm\n\nx86_64:\nkmod-kvm-83-272.el5_11.x86_64.rpm\nkmod-kvm-debug-83-272.el5_11.x86_64.rpm\nkvm-83-272.el5_11.x86_64.rpm\nkvm-debuginfo-83-272.el5_11.x86_64.rpm\nkvm-qemu-img-83-272.el5_11.x86_64.rpm\nkvm-tools-83-272.el5_11.x86_64.rpm\n\nThese packages are GPG signed by Red Hat for security. Our key and\ndetails on how to verify the signature are available from\nhttps://access.redhat.com/security/team/key/\n\n7. References:\n\nhttps://access.redhat.com/security/cve/CVE-2015-3456\nhttps://access.redhat.com/security/updates/classification/#important\n\n8. Contact:\n\nThe Red Hat security contact is \u003csecalert@redhat.com\u003e. More contact\ndetails at https://access.redhat.com/security/team/contact/\n\nCopyright 2015 Red Hat, Inc. \n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1\n\niD8DBQFVU1nfXlSAg2UNWIIRAtvxAKCVxqsaYdrCQN16dcpCIKajKnUzHgCfVy1r\n6y8+9uFGI3F4Epc74lb8mrg=\n=sjA3\n-----END PGP SIGNATURE-----\n\n\n--\nRHSA-announce mailing list\nRHSA-announce@redhat.com\nhttps://www.redhat.com/mailman/listinfo/rhsa-announce\n. Berrange discovered a denial of service vulnerability in\n the VNC web socket decoder. \n\nFor the oldstable distribution (wheezy), these problems have been fixed\nin version 1.1.2+dfsg-6a+deb7u7 of the qemu source package and in version\n1.1.2+dfsg-6+deb7u7 of the qemu-kvm source package. Only CVE-2015-3456\naffects oldstable. \n\nFor the stable distribution (jessie), these problems have been fixed in\nversion 1:2.1+dfsg-12. \n\nFor the unstable distribution (sid), these problems will be fixed soon. \n\nWe recommend that you upgrade your qemu packages. ============================================================================\nUbuntu Security Notice USN-2608-1\nMay 13, 2015\n\nqemu, qemu-kvm vulnerabilities\n============================================================================\n\nA security issue affects these releases of Ubuntu and its derivatives:\n\n- Ubuntu 15.04\n- Ubuntu 14.10\n- Ubuntu 14.04 LTS\n- Ubuntu 12.04 LTS\n\nSummary:\n\nSeveral security issues were fixed in QEMU. \n\nSoftware Description:\n- qemu: Machine emulator and virtualizer\n- qemu-kvm: Machine emulator and virtualizer\n\nDetails:\n\nJason Geffner discovered that QEMU incorrectly handled the virtual floppy\ndriver. This issue is known as VENOM. In the default installation,\nwhen QEMU is used with libvirt, attackers would be isolated by the libvirt\nAppArmor profile. (CVE-2015-3456)\n\nDaniel P. Berrange discovered that QEMU incorrectly handled VNC websockets. \nA remote attacker could use this issue to cause QEMU to consume memory,\nresulting in a denial of service. This issue only affected Ubuntu 14.04\nLTS, Ubuntu 14.10 and Ubuntu 15.04. (CVE-2015-1779)\n\nJan Beulich discovered that QEMU, when used with Xen, didn\u0027t properly\nrestrict access to PCI command registers. A malicious guest could use this\nissue to cause a denial of service. This issue only affected Ubuntu 14.04\nLTS and Ubuntu 14.10. (CVE-2015-2756)\n\nUpdate instructions:\n\nThe problem can be corrected by updating your system to the following\npackage versions:\n\nUbuntu 15.04:\n qemu-system 1:2.2+dfsg-5expubuntu9.1\n qemu-system-aarch64 1:2.2+dfsg-5expubuntu9.1\n qemu-system-arm 1:2.2+dfsg-5expubuntu9.1\n qemu-system-mips 1:2.2+dfsg-5expubuntu9.1\n qemu-system-misc 1:2.2+dfsg-5expubuntu9.1\n qemu-system-ppc 1:2.2+dfsg-5expubuntu9.1\n qemu-system-sparc 1:2.2+dfsg-5expubuntu9.1\n qemu-system-x86 1:2.2+dfsg-5expubuntu9.1\n\nUbuntu 14.10:\n qemu-system 2.1+dfsg-4ubuntu6.6\n qemu-system-aarch64 2.1+dfsg-4ubuntu6.6\n qemu-system-arm 2.1+dfsg-4ubuntu6.6\n qemu-system-mips 2.1+dfsg-4ubuntu6.6\n qemu-system-misc 2.1+dfsg-4ubuntu6.6\n qemu-system-ppc 2.1+dfsg-4ubuntu6.6\n qemu-system-sparc 2.1+dfsg-4ubuntu6.6\n qemu-system-x86 2.1+dfsg-4ubuntu6.6\n\nUbuntu 14.04 LTS:\n qemu-system 2.0.0+dfsg-2ubuntu1.11\n qemu-system-aarch64 2.0.0+dfsg-2ubuntu1.11\n qemu-system-arm 2.0.0+dfsg-2ubuntu1.11\n qemu-system-mips 2.0.0+dfsg-2ubuntu1.11\n qemu-system-misc 2.0.0+dfsg-2ubuntu1.11\n qemu-system-ppc 2.0.0+dfsg-2ubuntu1.11\n qemu-system-sparc 2.0.0+dfsg-2ubuntu1.11\n qemu-system-x86 2.0.0+dfsg-2ubuntu1.11\n\nUbuntu 12.04 LTS:\n qemu-kvm 1.0+noroms-0ubuntu14.22\n\nAfter a standard system update you need to restart all QEMU virtual\nmachines to make all the necessary changes",
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{
"date": "2015-05-13T18:59:00.157000",
"db": "NVD",
"id": "CVE-2015-3456",
"ident": null
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]
},
"sources_update_date": {
"_id": null,
"data": [
{
"date": "2021-11-17T00:00:00",
"db": "VULMON",
"id": "CVE-2015-3456",
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{
"date": "2017-04-18T00:05:00",
"db": "BID",
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{
"date": "2021-11-08T00:00:00",
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{
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"db": "NVD",
"id": "CVE-2015-3456",
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},
"threat_type": {
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"data": "specific network environment",
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"id": "CNNVD-201505-207"
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],
"trust": 0.6
},
"title": {
"_id": null,
"data": "QEMU Floppy Disk Controller Buffer error vulnerability",
"sources": [
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],
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},
"type": {
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{
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{
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{
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{
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"id": "131890"
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{
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"id": "132205"
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{
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"id": "131889"
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"id": "131899"
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}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.