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CVE-2013-1858

Impact:
Important
Public Date:
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 dictionary and NIST NVD.

Statement

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).

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected