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{"acknowledgement": "Red Hat would like to thank Qinghao Tang (QIHU 360 Inc) for reporting this issue.", "bugzilla": {"description": "Qemu: ide: divide by zero issue", "id": "1260080", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1260080"}, "csaw": false, "cvss": {"cvss_base_score": "2.3", "cvss_scoring_vector": "AV:A/AC:M/Au:S/C:N/I:N/A:P", "status": "draft"}, "cwe": "CWE-369", "details": ["hw/ide/core.c in QEMU does not properly restrict the commands accepted by an ATAPI device, which allows guest users to cause a denial of service or possibly have unspecified other impact via certain IDE commands, as demonstrated by a WIN_READ_NATIVE_MAX command to an empty drive, which triggers a divide-by-zero error and instance crash.", "It has been discovered that a QEMU emulator built with IDE disk and CD/DVD-ROM emulation support is vulnerable to a divide-by-zero issue. The flaw could occur when executing IDE's WIN_READ_NATIVE_MAX command to determine the maximum size of a drive. A privileged user inside the guest could use this flaw to crash the QEMU instance, resulting in a denial of service."], "name": "CVE-2015-6855", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "kvm", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "xen", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "qemu-kvm", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "qemu-kvm", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:openstack:5::el6", "fix_state": "Will not fix", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)"}, {"cpe": "cpe:/a:redhat:openstack:6", "fix_state": "Will not fix", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat Enterprise Linux OpenStack Platform 6 (Juno)"}, {"cpe": "cpe:/a:redhat:openstack:7", "fix_state": "Will not fix", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)"}], "public_date": "2015-09-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-6855\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-6855"], "statement": "This issue affects the versions of kvm and xen packages as shipped with Red Hat Enterprise Linux 5.\nThis issue affects the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6 and 7.\nThis issue affects the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.\nThis issue affect the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.", "threat_severity": "Low"}