CVE-2014-0592 in Barclamp
Summary
by MITRE
Barclamp (aka barclamp-network) 1.7 for the Crowbar Framework, as used in SUSE Cloud 3, does not enable netfilter on bridges when creating new instances, which allows remote attackers to bypass security group restrictions via unspecified vectors, related to floating IPs.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 05/09/2026
The vulnerability described in CVE-2014-0592 affects the Barclamp networking component within the Crowbar Framework version 1.7, specifically impacting SUSE Cloud 3 deployments. This security flaw resides in how the system handles network bridge configurations during instance creation processes, creating a significant gap in network security controls that can be exploited by remote attackers to circumvent established security policies.
The technical root cause of this vulnerability stems from the improper configuration of netfilter rules on network bridges within the virtualized environment. When new instances are created through the Crowbar Framework, the system fails to properly enable netfilter functionality on the bridges that connect virtual machines to the network infrastructure. This misconfiguration creates a network security gap where traffic flowing through these bridges bypasses the normal security group enforcement mechanisms that should be protecting the virtualized environment.
The operational impact of this vulnerability is substantial as it allows remote attackers to exploit the network configuration gap to bypass security group restrictions that are fundamental to cloud security architectures. Attackers can leverage this weakness to manipulate traffic flows, potentially gaining unauthorized access to resources that should be protected by security groups, particularly when dealing with floating IP addresses that are commonly used in cloud environments for external connectivity and load balancing purposes.
This vulnerability directly relates to CWE-284, which addresses improper access control issues, and aligns with ATT&CK technique T1046, which involves network service scanning and exploitation of network infrastructure weaknesses. The flaw essentially creates a backdoor in the network security architecture by failing to enforce proper packet filtering on bridge interfaces, allowing malicious traffic to traverse network boundaries that should be protected.
The security implications extend beyond simple access bypass to include potential data exfiltration, privilege escalation, and lateral movement within the cloud environment. Since floating IPs are typically used for external access to cloud resources, attackers could exploit this vulnerability to gain unauthorized access to services that should be restricted to specific network segments or user groups.
Mitigation strategies should focus on ensuring that netfilter is properly enabled and configured on all network bridges within the virtualized environment. System administrators should implement proper bridge configuration policies that enforce security group enforcement at the network level. Additionally, regular security audits should verify that network bridge configurations comply with security best practices and that all virtual network components properly enforce the intended security policies. Organizations should also consider implementing network segmentation and monitoring solutions to detect anomalous traffic patterns that might indicate exploitation of this vulnerability.