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SYNTHESIS OF THE VULNERABILITY

On a 2.6.32.x kernel, a local attacker can access to devtmpfs.

Severity: 2/4

Consequences: data reading, data creation/edition

Provenance: user shell

Means of attack: no proof of concept, no attack

Ability of attacker: expert (4/4)

Confidence: confirmed by the editor (5/5)

Diffusion of the vulnerable configuration: high (3/3)

Creation date: 01/02/2010

IMPACTED PRODUCTS

– Linux kernel
– Mandriva Linux
– OpenSUSE

DESCRIPTION OF THE VULNERABILITY

The devtmpfs filesystem was added in the kernel 2.6.32. It is used
to create device nodes, before mounting the / root, and before
mounting it to /dev.

A vulnerability, related to default access rights to devtmpfs, was
announced. Technical details are unknown.

On a 2.6.32.x kernel, a local attacker can thus for example
directly access to some restricted devices.

CHARACTERISTICS

Identifiers: CVE-2010-0299, MDVSA-2010:030, SUSE-SA:2010:010,
VIGILANCE-VUL-9396

http://vigilance.fr/vulnerability/Linux-kernel-incorrect-permissions-on-devtmpfs-9396