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    CVE-2018-12233

    In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in JFS can be triggered by calling setxattr twice with two different extended attribute names on the same file. This vulnerability can be triggered by an unprivileged user with the ability to create files and execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.

    Published:Jun 1, 2018
    Last Modified:Nov 21, 2024
    EPS:Jun 12, 2018
    EPSS Score:0.00074
    CVSS Score:7.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

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    References

    http://www.securityfocus.com/bid/104452
    https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
    https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
    https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
    https://lkml.org/lkml/2018/6/2/2
    https://marc.info/?l=linux-kernel&m=152814391530549&w=2
    https://usn.ubuntu.com/3752-1/
    https://usn.ubuntu.com/3752-2/
    https://usn.ubuntu.com/3752-3/
    https://usn.ubuntu.com/3753-1/
    https://usn.ubuntu.com/3753-2/
    https://usn.ubuntu.com/3754-1/
    http://www.securityfocus.com/bid/104452
    https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
    https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
    https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
    https://lkml.org/lkml/2018/6/2/2
    https://marc.info/?l=linux-kernel&m=152814391530549&w=2
    https://usn.ubuntu.com/3752-1/
    https://usn.ubuntu.com/3752-2/
    https://usn.ubuntu.com/3752-3/
    https://usn.ubuntu.com/3753-1/
    https://usn.ubuntu.com/3753-2/
    https://usn.ubuntu.com/3754-1/

    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