CVE-2013-1956

Severity

21%

Complexity

39%

Confidentiality

48%

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.

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.

CVSS 2.0 Base Score 2.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:P/A:N).

Overview

First reported 11 years ago

2013-04-24 19:55:00

Last updated 11 years ago

2013-05-01 04:00:00

Affected Software

Linux Kernel 3.8.0

3.8.0

Linux Kernel 3.8.1

3.8.1

Linux Kernel 3.8.2

3.8.2

Linux Kernel 3.8.3

3.8.3

Linux Kernel 3.8.4

3.8.4

Linux Kernel

References

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

[oss-security] 20130416 Re: Re: Summary of security bugs (now fixed) in user namespaces

https://github.com/torvalds/linux/commit/3151527ee007b73a0ebd296010f1c0454a919c7d

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