TITLE:
OpenBSD Kernfs Kernel Memory Disclosure Vulnerability

SECUNIA ADVISORY ID:
SA18712

VERIFY ADVISORY:
http://secunia.com/advisories/18712/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information

WHERE:
Local system

OPERATING SYSTEM:
OpenBSD 3.x
http://secunia.com/product/100/

DESCRIPTION:
SecurityLab Technologies has reported a vulnerability in OpenBSD,
which can be exploited by malicious, local users to disclose
potentially sensitive information.

The vulnerability is caused due to an input validation error in the
"kernfs_xread()" function within the handling of user-supplied offset
values. This can be exploited by a non-privileged process to read
arbitrary kernel memory via the kernfs file system.

The vulnerability has been reported in OpenBSD version 3.8.

NOTE: The vendor reports that kernfs is not linked into the GENERIC
kernel by default.

SOLUTION:
The kernfs code has reportedly already been removed from the current
kernel code.

PROVIDED AND/OR DISCOVERED BY:
SecurityLab Technologies.

ORIGINAL ADVISORY:
http://www.securitylab.net/research/2006/02/advisory_netbsd_openbsd_kernfs.html

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