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    CVE-2013-1858

    The clone system-call implementation in the Linux kernel before 3.8.3 does not properly handle a combination of the CLONE_NEWUSER and CLONE_FS flags, which allows local users to gain privileges by calling chroot and leveraging the sharing of the / directory between a parent process and a child process.

    Published:Mar 13, 2013
    Last Modified:Apr 11, 2025
    EPS:Apr 5, 2013
    EPSS Score:0.01201
    CVSS Score:7.2

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    http://stealth.openwall.net/xSports/clown-newuser.chttp://stealth.openwall.net/xSports/clown-newuser.c

    Common Weakness Enumeration

    CWE-284 Improper Access Control

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    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e66eded8309ebf679d3d3c1f5820d1f2ca332c71
    http://stealth.openwall.net/xSports/clown-newuser.c
    http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.3
    http://www.openwall.com/lists/oss-security/2013/03/14/6
    https://bugzilla.redhat.com/show_bug.cgi?id=921448
    https://github.com/torvalds/linux/commit/e66eded8309ebf679d3d3c1f5820d1f2ca332c71
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e66eded8309ebf679d3d3c1f5820d1f2ca332c71
    http://stealth.openwall.net/xSports/clown-newuser.c
    http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.3
    http://www.openwall.com/lists/oss-security/2013/03/14/6
    https://bugzilla.redhat.com/show_bug.cgi?id=921448
    https://github.com/torvalds/linux/commit/e66eded8309ebf679d3d3c1f5820d1f2ca332c71

    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