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      Last Modified:  04/24/2013

Quick Info

CVE Dictionary Entry:
CVE-2013-1956
Original release date:
04/24/2013
Last revised:
05/01/2013
Source:
US-CERT/NIST

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:
2.1 LOW
Vector:
(AV:L/AC:L/Au:N/C:N/I:P/A:N) (legend)
Impact Subscore:
2.9
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector:
Locally exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3151527ee007b73a0ebd296010f1c0454a919c7d Vendor Advisory External Source CONFIRM http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3151527ee007b73a0ebd296010f1c0454a919c7d
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6 External Source CONFIRM http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6
http://www.openwall.com/lists/oss-security/2013/04/16/11 External Source MLIST [oss-security] 20130416 Re: Re: Summary of security bugs (now fixed) in user namespaces
https://github.com/torvalds/linux/commit/3151527ee007b73a0ebd296010f1c0454a919c7d External Source CONFIRM 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