CVE-2013-6434 in Enterprise Virtualization Manager
Summary
by MITRE
The remote-viewer in Red Hat Enterprise Virtualization Manager (RHEV-M) before 3.3, when using a native SPICE client invocation method, initially makes insecure connections to the SPICE server, which allows man-in-the-middle attackers to spoof the SPICE server.
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Analysis
by VulDB Data Team • 06/08/2021
The vulnerability identified as CVE-2013-6434 represents a critical security flaw in the Red Hat Enterprise Virtualization Manager's remote-viewer component that affects versions prior to 3.3. This issue specifically manifests when the system employs native SPICE client invocation methods to establish connections to SPICE servers within virtualized environments. The fundamental security weakness lies in the initial connection establishment process where the remote-viewer component does not properly validate server certificates or implement secure connection protocols during the initial handshake phase. This insecure connection behavior creates a window of opportunity for malicious actors positioned within the network to intercept and manipulate communications between the client and server components.
The technical implementation of this vulnerability stems from the remote-viewer application's failure to enforce proper cryptographic security measures during the initial SPICE server connection phase. When a user attempts to establish a remote desktop session using the native SPICE client method, the system initially establishes an unencrypted or improperly encrypted connection before transitioning to a secure channel. This design flaw allows attackers to perform man-in-the-middle attacks by intercepting the initial connection attempt and presenting forged server certificates that appear legitimate to the client application. The vulnerability directly maps to CWE-295 which addresses "Improper Certificate Validation" and specifically relates to the absence of proper certificate verification mechanisms during the initial connection establishment process.
The operational impact of this vulnerability extends beyond simple data interception as it fundamentally compromises the integrity and confidentiality of virtual desktop sessions within enterprise virtualization environments. Attackers exploiting this weakness can not only eavesdrop on sensitive communications but also potentially inject malicious commands or modify session data in real-time. This poses significant risks to organizations relying on RHEV-M for critical virtualized workloads where the compromise of a single virtual desktop session could lead to broader network infiltration. The vulnerability affects the core authentication and encryption mechanisms that protect virtual desktop infrastructure, potentially allowing attackers to gain unauthorized access to virtual machines and their underlying data.
Organizations should implement immediate mitigations including upgrading to RHEV-M version 3.3 or later where the vulnerability has been addressed through proper certificate validation implementation. Network segmentation and monitoring solutions should be deployed to detect anomalous connection patterns that might indicate man-in-the-middle activity. The remediation process should also include verifying that all SPICE client implementations properly validate server certificates and implement secure connection establishment protocols. Security teams should conduct comprehensive network audits to identify any instances where vulnerable versions remain operational and ensure that proper certificate management practices are implemented across all virtualization infrastructure components. This vulnerability highlights the critical importance of secure connection establishment protocols in virtualization environments and demonstrates the potential for cryptographic weaknesses to create fundamental security breaches in enterprise infrastructure.