Via oss-sec / RH:

Franck Grosjean of Red Hat reports:

Description of problem:
acl definitions are not enforced and could be bypassed by a user without write access to the cib

Version-Release number of selected component (if applicable):
RedHat Enterprise Linux 6.6
pcs --version = 0.9.123
pacemakerd --version = Pacemaker 1.1.11

How reproducible:
a user with a read-only role can assign any other existing roles to himself and then gain any kind of access from any role (rw access to the cib if this kind of role exist).

Steps to Reproduce:
1. create a role read-only
   pcs acl role create read-only description="Read only access" read xpath /cib
   2. create a role admin
      pcs acl role create admin description="Admin access" write xpath /cib
      3. create an account (local + pcs)
      4. open a session with this roaccount account
      5. add admin role to your account
         pcs acl role assign admin to rocluster
	6. check new acl pushed as a read-only user
	    pcs acl
	      User: rocluster
	          Roles: read-only admin
		    Role: read-only
		        Description: Read only access
			    Permission: read xpath /cib (read-only-read)
			      Role: admin
			          Description: Admin access
				      Permission: write xpath /cib (admin-write)
				      7. add/delete/modify anything

Actual results:
obtain rw access to the cib

Expected results:
must not be possible with read-only access to the cib to assign a role


Introduced in: https://github.com/ClusterLabs/pacemaker/commit/f242c1ef
Fixed in:      https://github.com/ClusterLabs/pacemaker/commit/84ac07c




Checked the code:
For SLE this makes SLE 11 not affected, SLE 12 affected
openSUSE 13.2 affected.


References:
https://bugzilla.redhat.com/show_bug.cgi?id=1211370
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-1867
http://seclists.org/oss-sec/2015/q2/126
http://people.canonical.com/~ubuntu-security/cve/2015/CVE-2015-1867.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1867
https://github.com/ClusterLabs/pacemaker/commit/f242c1ef
https://github.com/ClusterLabs/pacemaker/commit/84ac07c