ESA-03: Walrus Authentication Bypass Vulnerability

ESA-03: Walrus Authentication Bypass Vulnerability

Eucalyptus Security Advisory

Advisory ID:                  ESA-03
Date:                         7-11-2012
Severity:                     Critical
Affected Versions:            Eucalyptus 2.0.3, 3.0.1 and earlier
CVE Number:                   CVE-2012-3240


A security vulnerability has been identified in Eucalyptus 3.0.1 
and earlier. An update is now available that resolves this issue. 
We advise immediately updating all affected Eucalyptus 
installations following the instructions below. 


Walrus is a storage service included with Eucalyptus. It allows 
users to store and access persistent data organized as buckets
and objects. A flaw was found in the way Walrus performs 
authentication of users. An attacker could submit a 
specially-crafted REST request to the Walrus public interface 
that would allow the attacker to authenticate as a Eucalyptus 
admin user and potentially gain full access to objects stored 
on Walrus.


Eucalyptus versions 3.0.2 and 3.1.0 resolve this issue. 
Please see 
for instructions on downloading and upgrading to the latest 
Eucalyptus software.


Contact the Eucalyptus Security Team at