CVE-2014-5207

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    CVE-2014-5207

    Published: 18 Aug 2014Last Modified: 10 Apr 2026

    Summary:

    Details: fs/namespace.c in the Linux kernel through 3.16.1 does not properly restrict clearing MNT_NODEV, MNT_NOSUID, and MNT_NOEXEC and changing MNT_ATIME_MASK during a remount of a bind mount, which allows local users to gain privileges, interfere with backups and auditing on systems that had atime enabled, or cause a denial of service (excessive filesystem updating) on systems that had atime disabled via a "mount -o remount" command within a user namespace.

    References: http://packetstormsecurity.com/files/128595/Linux-Kernel-3.16.1-FUSE-Privilege-Escalation.html, http://seclists.org/oss-sec/2014/q3/352, http://www.exploit-db.com/exploits/34923, http://www.openwall.com/lists/oss-security/2014/08/13/4, http://www.securityfocus.com/bid/69216, 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://exchange.xforce.ibmcloud.com/vulnerabilities/95266, https://github.com/torvalds/linux/commit/9566d6742852c527bf5af38af5cbb878dad75705, http://seclists.org/oss-sec/2014/q3/352, http://www.openwall.com/lists/oss-security/2014/08/13/4, http://packetstormsecurity.com/files/128595/Linux-Kernel-3.16.1-FUSE-Privilege-Escalation.html, http://www.exploit-db.com/exploits/34923, https://bugzilla.redhat.com/show_bug.cgi?id=1129662, https://github.com/torvalds/linux/commit/9566d6742852c527bf5af38af5cbb878dad75705, https://bugzilla.redhat.com/show_bug.cgi?id=1129662, http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9566d6742852c527bf5af38af5cbb878dad75705, http://osvdb.org/show/osvdb/110055

    Affected packages

    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