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    CVE-2014-5206

    The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a "mount -o remount" command within a user namespace.

    Published:Aug 1, 2014
    Last Modified:Apr 12, 2025
    EPS:Aug 18, 2014
    EPSS Score:0.00037
    CVSS Score:7.2

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-269 Improper Privilege Management

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    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a6138db815df5ee542d848318e5dae681590fccd
    http://www.openwall.com/lists/oss-security/2014/08/13/4
    http://www.securityfocus.com/bid/69214
    http://www.ubuntu.com/usn/USN-2317-1
    http://www.ubuntu.com/usn/USN-2318-1
    https://bugzilla.redhat.com/show_bug.cgi?id=1129662
    https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a6138db815df5ee542d848318e5dae681590fccd
    http://www.openwall.com/lists/oss-security/2014/08/13/4
    http://www.securityfocus.com/bid/69214
    http://www.ubuntu.com/usn/USN-2317-1
    http://www.ubuntu.com/usn/USN-2318-1
    https://bugzilla.redhat.com/show_bug.cgi?id=1129662
    https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd

    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