CVE Database


Impact: Important
Public: 2013-03-13
CWE: CWE-284
Bugzilla: 921448: CVE-2013-1858 kernel: CLONE_NEWUSER | CLONE_FS chroot exploit


The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2013-1858 from the MITRE CVE dictionary and NIST NVD.


This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG 2.
This issue did not affect the versions of the Linux kernel as shipped with Fedora 17 and 18 as they were not built with CONFIG_USER_NS configuration option.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score: 7.2
Base Metrics: AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector: Local
Access Complexity: Low
Authentication: None
Confidentiality Impact: Complete
Integrity Impact: Complete
Availability Impact: Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date

External References

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For clarification or corrections please contact the Red Hat Security Response Team.