From: Secunia Security Advisories (sec-advsecunia.com)
Date: Tue Jul 06 2004 - 09:08:21 CDT

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TITLE:
Linux VServer procfs Permission Weakness

SECUNIA ADVISORY ID:
SA12021

VERIFY ADVISORY:
http://secunia.com/advisories/12021/

CRITICAL:
Not critical

IMPACT:
Exposure of sensitive information, DoS

WHERE:
Local system

SOFTWARE:
Linux VServer 1.x
http://secunia.com/product/2983/

DESCRIPTION:
Veit Wahlich has reported a weakness in Linux VServer, which can be
exploited by certain malicious, local users to cause a DoS (Denial of
Service) or gain knowledge of sensitive information.

The vulnerability is caused due to weak permissions on procfs, which
allows a privileged user on a virtual server to manipulate the
permissions on "/proc" for all virtual servers or gain knowledge of
information related to other virtual servers.

The vulnerability has been reported in the following versions:
* 1.27 and prior (Linux 2.4 stable branch)
* 1.3.9 and prior (Linux 2.4 devel branch)
* 1.9.1 and prior (Linux 2.6 devel branch)

SOLUTION:
Update to version 1.28.
http://www.13thfloor.at/vserver/s_release/v1.28/

PROVIDED AND/OR DISCOVERED BY:
Veit Wahlich

ORIGINAL ADVISORY:
http://ircnet.de/article.shtml?vsproc

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