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    CVE-2018-12633

    An issue was discovered in the Linux kernel through 4.17.2. vbg_misc_device_ioctl() in drivers/virt/vboxguest/vboxguest_linux.c reads the same user data twice with copy_from_user. The header part of the user data is double-fetched, and a malicious user thread can tamper with the critical variables (hdr.size_in and hdr.size_out) in the header between the two fetches because of a race condition, leading to severe kernel errors, such as buffer over-accesses. This bug can cause a local denial of service and information leakage.

    Published:May 8, 2018
    Last Modified:Nov 21, 2024
    EPS:Jun 22, 2018
    EPSS Score:0.00025
    CVSS Score:6.3

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    https://github.com/wiliam227user/CVE-2018-12633-TPLink-Auth-Bypass

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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