CVE-2012-4066 in Eucalyptus
Summary
by MITRE
The internal message protocol for Walrus in Eucalyptus 3.2.0 and earlier does not require signatures for unspecified request headers, which allows attackers to (1) delete or (2) upload snapshots.
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Analysis
by VulDB Data Team • 12/30/2021
The vulnerability identified as CVE-2012-4066 resides within the Walrus storage service component of Eucalyptus cloud infrastructure version 3.2.0 and earlier. This issue fundamentally undermines the security posture of the system by exploiting weaknesses in the internal message protocol design. The affected Walrus service operates as a key component within Eucalyptus cloud deployments, providing object storage capabilities that are integral to cloud computing environments. The vulnerability manifests in the protocol's failure to enforce cryptographic signatures for unspecified request headers, creating a critical security gap that can be exploited by malicious actors.
The technical flaw stems from the absence of proper authentication mechanisms within the internal communication protocol of Walrus. When requests are processed through the system, certain headers that should be verified for authenticity are not subject to signature validation. This omission allows attackers to manipulate request parameters without detection, effectively bypassing the system's security controls. The vulnerability specifically enables two distinct attack vectors: unauthorized deletion of snapshots and unauthorized upload of snapshots. These operations represent significant threats to data integrity and availability within cloud environments where snapshot management is crucial for backup and recovery operations.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally compromises the trust model of the cloud infrastructure. Attackers who can exploit this weakness gain the ability to manipulate critical storage operations within the Eucalyptus environment. The unauthorized deletion capability poses severe risks to data availability and business continuity, while the unauthorized upload function can lead to data injection attacks and potential system compromise. These attacks can be executed without detection, as the system's internal protocol does not validate the authenticity of unspecified headers, creating a blind spot in the security architecture.
From a cybersecurity perspective, this vulnerability aligns with CWE-345 Insufficient Verification of Data Authenticity, which addresses the lack of proper authentication mechanisms in data processing systems. The attack surface is particularly concerning within cloud computing environments where internal components communicate with minimal oversight, making such vulnerabilities more dangerous due to the trust relationships that exist between system components. The ATT&CK framework categorizes this type of vulnerability under privilege escalation and defense evasion techniques, as attackers can leverage it to manipulate system state without triggering security alerts.
Mitigation strategies for CVE-2012-4066 require immediate attention through system updates and configuration changes. Organizations should upgrade to Eucalyptus versions that address this specific vulnerability, as the official patches would implement proper signature validation for all request headers. Additionally, network segmentation and monitoring should be enhanced to detect anomalous behavior in internal storage communications. Implementing additional authentication layers and cryptographic verification mechanisms for internal APIs would provide defense in depth. The vulnerability also underscores the importance of comprehensive security testing for internal protocols, as many organizations focus primarily on external attack surfaces while neglecting the security of internal communication channels that often contain the most sensitive operations.