A Security Vulnerability in the Solaris iSCSI Management Commands (iscsiadm(1M) and iscsitadm(1M)) may Allow Privilege Escalation

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A security vulnerability in the Solaris iSCSI Management commands (iscsiadm(1M) and iscsitadm(1M)) may allow privilege escalation:

1. Impact

A security vulnerability in the Solaris iSCSI management commands (iscsiadm(1M) and iscsitadm(1M)) may allow a local user who has been assigned an RBAC execution profile which specifies additional privileges for the iscsiadm(1M) or iscsitadm(1M) commands, such as the "File System Management" profile, to execute arbitrary commands with the privileges specified in the RBAC profile.

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

• Solaris 10 with patch 119090-16 through 119090-32 and without patch 119090-33
  
• OpenSolaris based upon builds snv_28 through snv_109
  

x86 Platform

• Solaris 10 with patch 119091-16 through 119091-33 and without patch 119091-34
  
• OpenSolaris based upon builds snv_28 through snv_109

Note 1: Solaris 8 and Solaris 9 are not impacted by this issue.

Note 2: OpenSolaris distributions may include additional bug fixes above and beyond the build from which it was derived.  To determine the base build of OpenSolaris, the following command can be used:

    $ uname -v
    snv_86

Note 3: This issue only affects systems where a local user has been granted an execution profile allowing them to run the iscsiadm(1M) or iscsitadm(1M) commands with elevated privileges such as the "File System Management" profile.

The assignment of profiles to users is configured in the user_attr(4) database. The exec_attr(4) database specifies the execution attributes associated with profiles. Thus, if a system is configured to only reference local files for the user_attr(4) and exec_attr(4) databases then users who have been assigned a profile containing iscsiadm(1M) or iscsitadm(1M) can be determined as follows:

    $ egrep 'iscsiadm|iscsitadm' /etc/security/exec_attr
    File System Management:solaris:cmd:::/usr/sbin/iscsiadm:euid=0;privs=basic
    File System Management:solaris:cmd:::/usr/sbin/iscsitadm:euid=0;privs=basic

    $ grep 'File System Management' /etc/user_attr
    username::::profiles=File System Management

Systems which are configured via nsswitch.conf(4) to use attribute sources other than local files for the user_attr(4) and exec_attr(4) databases will need to use the relevant commands to perform the equivalent search.  See the documentation for the relevant attribute source (for example, ldap(1), ypfiles(4) or nis+(1)) for details.

3. Symptoms

There are no predictable symptoms that would indicate the described issue has occurred.

4. Workaround

To work around this issue until patches can be applied, remove references to the iscsiadm(1M) and iscsitadm(1M) commands from the exec_attr(4) database. This will result in users who have been assigned the relevant execution profile(s) to no longer be granted privileged access to the iscsiadm(1M) and iscsitadm(1M) commands.

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

• Solaris 10 with patch 119090-33 or later
  
• OpenSolaris based upon builds snv_110 or later
  

x86 Platform

• Solaris 10 with patch 119091-34 or later
  
• OpenSolaris based upon builds snv_110 or later

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

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