[SA19961] Linux-VServer "ccaps" Insecure Capabilities Security Issue

2006-05-06T00:00:00
ID SECURITYVULNS:DOC:12562
Type securityvulns
Reporter Securityvulns
Modified 2006-05-06T00:00:00

Description

TITLE: Linux-VServer "ccaps" Insecure Capabilities Security Issue

SECUNIA ADVISORY ID: SA19961

VERIFY ADVISORY: http://secunia.com/advisories/19961/

CRITICAL: Less critical

IMPACT: Privilege escalation

WHERE: Local system

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

DESCRIPTION: Jan Rekorajski has reported a security issue in Linux-VServer, which can be exploited by malicious, local users to perform certain actions with escalated privileges.

The problem is caused by certain context capabilities, which are not limited to the guest-root. This allows users inside the guest to perform certain actions on usually restricted resources.

The security issue is reported for versions 0.09.10 to vs2.0-rc2.

SOLUTION: Apply patch (kernel 2.6.16). http://vserver.13thfloor.at/Stuff/delta-vxcapable-fix01a.diff

Reportedly fixed in version vs2.0.2-rc18 and vs2.1.1-rc18 (kernel 2.6.16.11).

PROVIDED AND/OR DISCOVERED BY: Jan Rekorajski

ORIGINAL ADVISORY: http://list.linux-vserver.org/archive/vserver/msg13167.html


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