FKIE_CVE-2016-4020

Vulnerability from fkie_nvd - Published: 2016-05-25 15:59 - Updated: 2025-04-12 10:46
Severity ?
6.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Summary
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
References
secalert@redhat.comhttp://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=691a02e2ce0c413236a78dee6f2651c937b09fb0
secalert@redhat.comhttp://www.securityfocus.com/bid/86067Third Party Advisory, VDB Entry
secalert@redhat.comhttp://www.ubuntu.com/usn/USN-2974-1Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2017:1856Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2017:2392Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2017:2408Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1313686Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlMailing List, Third Party Advisory
secalert@redhat.comhttps://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01106.htmlPatch, Third Party Advisory
secalert@redhat.comhttps://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.htmlPatch, Third Party Advisory
secalert@redhat.comhttps://security.gentoo.org/glsa/201609-01Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=691a02e2ce0c413236a78dee6f2651c937b09fb0
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/86067Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2974-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:1856Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:2392Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:2408Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1313686Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01106.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/201609-01Third Party Advisory
Impacted products
Vendor Product Version
qemu qemu *
canonical ubuntu_linux 12.04
canonical ubuntu_linux 14.04
canonical ubuntu_linux 15.10
canonical ubuntu_linux 16.04
debian debian_linux 8.0
redhat openstack 6.0
redhat openstack 7.0
redhat openstack 8
redhat openstack 9
redhat openstack 10
redhat openstack 11
redhat enterprise_linux_desktop 7.0
redhat enterprise_linux_eus 7.4
redhat enterprise_linux_eus 7.5
redhat enterprise_linux_eus 7.6
redhat enterprise_linux_eus 7.7
redhat enterprise_linux_server 7.0
redhat enterprise_linux_server_aus 7.4
redhat enterprise_linux_server_aus 7.6
redhat enterprise_linux_server_aus 7.7
redhat enterprise_linux_server_tus 7.6
redhat enterprise_linux_server_tus 7.7
redhat enterprise_linux_workstation 7.0
redhat virtualization 4.0
redhat enterprise_linux 7.0
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR)."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n patch_instruction en hw/i386/kvmvapic.c en QEMU no inicializa la variable imm32, lo que permite a administradores locales del SO invitado obtener informaci\u00f3n sensible de la memoria de pila del anfitri\u00f3n accediendo al Task Priority Register (TPR)."
    }
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  "id": "CVE-2016-4020",
  "lastModified": "2025-04-12T10:46:40.837",
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}


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  • 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.
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