National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2013-1956 Detail

Description

The create_user_ns function in kernel/user_namespace.c in the Linux kernel before 3.8.6 does not check whether a chroot directory exists that differs from the namespace root directory, which allows local users to bypass intended filesystem restrictions via a crafted clone system call.

Source:  MITRE
Description Last Modified:  04/24/2013

Impact

CVSS v2.0 Severity and Metrics:

Base Score: 2.1 LOW
Vector: (AV:L/AC:L/Au:N/C:N/I:P/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 3.9


Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): Partial
Availability (A): None
Additional Information:
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3151527ee007b73a0ebd296010f1c0454a919c7d Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6
http://www.openwall.com/lists/oss-security/2013/04/16/11
https://github.com/torvalds/linux/commit/3151527ee007b73a0ebd296010f1c0454a919c7d

Technical Details

Vulnerability Type (View All)

  • Permissions, Privileges, and Access Control (CWE-264)

Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2013-1956
NVD Published Date:
04/24/2013
NVD Last Modified:
05/01/2013