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    CVE-2019-20175

    An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a "privileged guest user has many ways to cause similar DoS effect, without triggering this assert.

    Published:Dec 31, 2019
    Last Modified:Nov 21, 2024
    EPS:Dec 31, 2019
    EPSS Score:0.00537
    CVSS Score:7.5

    Affected Products

    Vendor
    Qemu
    Product
    Qemu

    Exploits

    https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.htmlhttps://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High