Rechercher
Contactez-nous Suivez-nous sur Twitter En francais English Language
 

Freely subscribe to our NEWSLETTER

Newsletter FR

Newsletter EN

Vulnérabilités

Unsubscribe

Vigil@nce: FreeBSD, privilege elevation via devfs and VFS

October 2009 by Vigil@nce

SYNTHESIS OF THE VULNERABILITY

A local attacker can use devfs and VFS, in order to obtain kernel
privileges.

Severity: 2/4

Consequences: administrator access/rights

Provenance: user shell

Means of attack: 1 attack

Ability of attacker: technician (2/4)

Confidence: confirmed by the editor (5/5)

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

Creation date: 05/10/2009

Revision date: 09/10/2009

IMPACTED PRODUCTS

 FreeBSD

DESCRIPTION OF THE VULNERABILITY

The devfs (/dev) filesystem is used to access to systems devices.
The VFS (Virtual File System) filesystem creates a virtual layer.

When devfs and VFS are used simultaneously, the fp->f_vnode
pointer of the sys/fs/devfs/devfs_vnops.c file can become NULL. A
local attacker can thus use VIGILANCE-VUL-9069
(https://vigilance.fr/tree/1/9069) in order to force the kernel to
execute a malicious function.

A local attacker can therefore use devfs and VFS, in order to
obtain kernel privileges.

CHARACTERISTICS

Identifiers: BID-36587, FreeBSD-SA-09:14.devfs, VIGILANCE-VUL-9071

http://vigilance.fr/vulnerability/FreeBSD-privilege-elevation-via-devfs-and-VFS-9071


See previous articles

    

See next articles


Your podcast Here

New, you can have your Podcast here. Contact us for more information ask:
Marc Brami
Phone: +33 1 40 92 05 55
Mail: ipsimp@free.fr

All new podcasts