Linux-VServer Local Insecure Guest Context Capabilities Vulnerability

BID:17842

Info

Linux-VServer Local Insecure Guest Context Capabilities Vulnerability

Bugtraq ID: 17842
Class: Design Error
CVE: CVE-2006-2110
Remote: No
Local: Yes
Published: May 04 2006 12:00AM
Updated: May 19 2006 09:48PM
Credit: Jan Rekorajski reported this issue to the vendor.
Vulnerable: VServer Linux-VServer 2.1
VServer Linux-VServer 2.0.1
VServer Linux-VServer 2.0
VServer Linux-VServer 1.9.1
VServer Linux-VServer 0.9.12
VServer Linux-VServer 0.9.10
VServer Linux-VServer 2.0-rc2
VServer Linux-VServer 2.0-rc1
Debian Linux 3.1 sparc
Debian Linux 3.1 s/390
Debian Linux 3.1 ppc
Debian Linux 3.1 mipsel
Debian Linux 3.1 mips
Debian Linux 3.1 m68k
Debian Linux 3.1 ia-64
Debian Linux 3.1 ia-32
Debian Linux 3.1 hppa
Debian Linux 3.1 arm
Debian Linux 3.1 amd64
Debian Linux 3.1 alpha
Debian Linux 3.1
Not Vulnerable: VServer Linux-VServer 2.1.1 -rc18
VServer Linux-VServer 2.0.2 -rc18

Discussion

Linux-VServer Local Insecure Guest Context Capabilities Vulnerability

The Linux-VServer package is susceptible to a vulnerability regarding insecure guest-context capabilities. This issue is due to the kernel's failure to properly enforce security restrictions in guest hosts.

This issue allows unprivileged users in guest hosts to perform various operations that should be restricted to superusers. By exploiting this issue, attackers can launch various attacks in guest hosts.

Note that this issue allows attackers to execute privileged operations only in the guest context, not in the host context.

Exploit / POC

Linux-VServer Local Insecure Guest Context Capabilities Vulnerability

Attackers exploit this issue by using standard systems-administration utilities.

Solution / Fix

Linux-VServer Local Insecure Guest Context Capabilities Vulnerability

Solution:
The vendor has released a patch to address this issue.

Versions 2.0.2-rc18 and 2.1.1-rc18 are also available; they contain this fix.

Please see the references for more information, fixes, and vendor advisories.


VServer Linux-VServer 2.0-rc2

VServer Linux-VServer 2.0-rc1

VServer Linux-VServer 1.9.1

VServer Linux-VServer 2.0

VServer Linux-VServer 2.0.1

VServer Linux-VServer 2.1

References

Linux-VServer Local Insecure Guest Context Capabilities Vulnerability

References:
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