Eucalyptus Walrus REST Interface Key Verification Authentication Bypass (ESA-03)
Medium Nessus Plugin ID 61611
SynopsisThe remote web server contains a Java application that is affected by a security bypass vulnerability.
DescriptionThe version of Eucalyptus Walrus hosted on the remote web server contains a flaw in the 'WalrusComponentLoginModule' class's 'authenticate' method that allows a remote, unauthenticated attacker to create, read, and write to buckets as an administrator.
When an affected Walrus instance receives a REST request, it processes that request in the context of an administrative user and verifies that the RSA signature in the 'EucaSignature' header matches the public key from the X.509 certificate in the 'EucaCert' header. The issue is that while the correlation between the certificate and the signature is checked, no effort is made to ensure that the certificate is recognized as trusted.
SolutionUpgrade to version 3.0.2 / 3.1.0 or later.