ESA-10: Missing Authorization Vulnerability in Walrus

Eucalyptus Security Advisory
Advisory ID: 
Severity Level: 
Issue Date: 
Last Updated: 
Affected Products: 
Eucalyptus 3.2.1 and earlier


A security vulnerability has been identified in the way Walrus was handling authorization for some operations on buckets in Eucalyptus 3.2.1 and earlier. An update is now available that resolves this issue. We advise updating all affected Eucalyptus installations following the instructions below.


Walrus is a storage service included with Eucalyptus. A flaw was identified in the way Walrus checks authorization for some operations on buckets. As a result, an authenticated user does not require authorization to enable logging and versioning on buckets and could potentially get access to activity logs for that bucket.


Eucalyptus version 3.2.2 resolves this issue.

Please see for instructions on downloading and upgrading to the latest Eucalyptus software.

Contact and Help

Contact the Eucalyptus Security Team at