Eucalyptus Walrus REST Interface Key Verification Authentication Bypass (ESA-03)

high Nessus Plugin ID 61611
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VPR Score: 5.9

Synopsis

The remote web server contains a Java application that is affected by a security bypass vulnerability.

Description

The 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.

Solution

Upgrade to version 3.0.2 / 3.1.0 or later.

See Also

http://www.eucalyptus.com/eucalyptus-cloud/security/esa-03

https://eucalyptus.atlassian.net/browse/EUCA-1717

http://www.nessus.org/u?fd1057d0

Plugin Details

Severity: High

ID: 61611

File Name: eucalyptus_esa03.nasl

Version: 1.9

Type: remote

Family: CGI abuses

Published: 8/21/2012

Updated: 1/19/2021

Dependencies: eucalyptus_walrus_detect.nasl

Risk Information

Risk Factor: High

VPR Score: 5.9

CVSS Score Source: CVE-2012-3240

CVSS v2.0

Base Score: 7.5

Temporal Score: 6.8

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:POC/RL:U/RC:C

Vulnerability Information

CPE: cpe:/a:eucalyptus:eucalyptus

Required KB Items: www/eucalyptus_walrus

Excluded KB Items: Settings/disable_cgi_scanning

Exploit Available: true

Exploit Ease: Exploits are available

Exploited by Nessus: true

Patch Publication Date: 3/26/2012

Vulnerability Publication Date: 7/11/2012

Reference Information

CVE: CVE-2012-3240

BID: 54404