Security Vulnerability in Solaris Trusted Extensions Labeled Networking may lead to remote unauthorized access to the Global Zone (zones(5)) of the System

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Security Vulnerability in Solaris Trusted Extensions Labeled Networking may lead to remote unauthorized access to the Global Zone (zones(5)) of the System

1. Impact

If a Solaris Trusted Extensions system has a labeled zone which is in the "installed" state, a security vulnerability in Solaris Trusted Extensions labeled networking may allow remote unauthorized users from another system (at the same label) to gain access to the global zone of the affected system, if that user has access to a username and password that is valid within the global zone. This is a Mandatory Access Control (MAC) policy violation. The global zone in the Solaris Trusted Extensions system is the administrative zone, which should only be accessible to administrative roles (see rbac(5)).

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

• Solaris 10 without patch 125100-08
• OpenSolaris based upon builds snv_39 through snv_67
  

x86 Platform

• Solaris 10 without patch 125101-08
• OpenSolaris based upon builds snv_39 through snv_67

Notes:

1. Solaris 8 and Solaris 9 are not impacted by this issue. Releases prior to Solaris 10 11/06 do not include Solaris Trusted Extensions and so are not vulnerable to this issue.
2. This issue only impacts Solaris 10 and OpenSolaris systems which have installed and configured Solaris Trusted Extensions and which have a labeled zone which is in the "installed" state.

To determine if a system is configured with Trusted Extensions, the following command can be run:

$ svcs /system/labeld
STATE          STIME      FMRI
online  07:08:09   svc:/system/labeld:default

If the state is disabled or if "/system/labeld" service is not listed, then the system is not configured to use Trusted Extensions.

To determine if a labeled zone is in the "installed" state, the following command can be run:

$ zoneadm list -cv
ID NAME        STATUS          PATH             BRAND
0 global     running        /                 native
1 public     running        /zone/public      native
2 internal   running        /zone/internal    native
3 needtoknow running        /zone/needtoknow  native
- restricted installed      /zone/restricted  native

If the status of a zone is "installed", then the zone is in the installed state.

3. Symptoms

There are no reliable symptoms that would indicate the described issue has been exploited to gain unauthorized access to the global zone of the system.

4. Workaround

There is no workaround for this issue. Please see the Resolution section below.

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

• Solaris 10 with patch 125100-08 or later
• OpenSolaris based upon builds snv_68 or later

x86 Platform

• Solaris 10 with patch 125101-08 or later
• OpenSolaris based upon builds snv_68 or later

For more information on Security Sun Alerts, see Technical Instruction ID 213557.

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