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{"acknowledgement": "Red Hat would like to thank Xen project for reporting this issue. Upstream acknowledges Donghai Zhu (Alibaba) as the original reporter.", "bugzilla": {"description": "Qemu: BlockBackend object use after free issue (XSA-139)", "id": "1248997", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1248997"}, "csaw": false, "cvss": {"cvss_base_score": "2.9", "cvss_scoring_vector": "AV:A/AC:M/Au:N/C:N/I:N/A:P", "status": "draft"}, "cwe": "CWE-416", "details": ["Use-after-free vulnerability in QEMU in Xen 4.5.x and earlier does not completely unplug emulated block devices, which allows local HVM guest users to gain privileges by unplugging a block device twice.", "A flaw has been found in the QEMU emulator built with IDE Emulation PCI PIIX3/4 support; the emulator is vulnerable to a use-after-free flaw, while writing data to an I/O port inside a guest. This issue is specific to the Xen platform. A privileged(CAP_SYS_RAWIO) guest user on the Xen platform could use this flaw to crash the QEMU instance or attempt to make a guest escape to QEMU-process privileges."], "name": "CVE-2015-5166", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kvm", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "xen", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "qemu-kvm", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "qemu-kvm", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:openstack:5::el6", "fix_state": "Not affected", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)"}, {"cpe": "cpe:/a:redhat:openstack:6", "fix_state": "Not affected", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat Enterprise Linux OpenStack Platform 6 (Juno)"}, {"cpe": "cpe:/a:redhat:openstack:7", "fix_state": "Not affected", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)"}], "public_date": "2015-08-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-5166\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-5166\nhttp://xenbits.xen.org/xsa/advisory-139.html"], "statement": "This issue does not affect the versions of kvm and xen packages as shipped with Red Hat Enterprise Linux 5.\nThis issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6.\nThis issue does not affect the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.\nThis issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 7.\nThis issue does not affect the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.\nThis issue does not affect the qemu-kvm-rhev packages as shipped with any currently supported versions of Red Hat Enterprise Linux OpenStack Platform.", "threat_severity": "Moderate"}