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CVE-2013-1956

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Date: April 24, 2013

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.

Language: C

Severity Score

Related Resources (6)

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3151527ee007b73a0ebd296010f1c0454a919c7d
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6
https://nvd.nist.gov/vuln/detail/CVE-2013-1956
https://github.com/torvalds/linux/commit/3151527ee007b73a0ebd296010f1c0454a919c7d
http://www.openwall.com/lists/oss-security/2013/04/16/11
https://www.mend.io/vulnerability-database/CVE-2013-1956

Severity Score

Weakness Type (CWE)

Permissions, Privileges, and Access Control

CWE-264

Top Fix

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CVSS v3

Base Score:
Attack Vector (AV):
Attack Complexity (AC):
Privileges Required (PR):
User Interaction (UI):
Scope (S):
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV):
Access Complexity (AC):
Authentication (AU):
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH
Additional information:

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