CVE-2006-6429 in WorkCentre
Summary
by MITRE
Xerox WorkCentre and WorkCentre Pro before 12.060.17.000, 13.x before 13.060.17.000, and 14.x before 14.060.17.000 allows attackers to modify certain configuration settings via unspecified vectors involving the "TFTP/BOOTP auto configuration option."
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Analysis
by VulDB Data Team • 12/19/2016
The vulnerability described in CVE-2006-6429 represents a critical configuration management flaw affecting Xerox WorkCentre and WorkCentre Pro multifunction devices across multiple software versions. This issue specifically targets the TFTP/BOOTP auto configuration option mechanism that devices use to automatically retrieve network configuration parameters during the boot process. The vulnerability allows remote attackers to manipulate device settings through unspecified vectors that leverage the trust relationship established during the TFTP boot process, potentially enabling unauthorized configuration changes that could compromise device integrity and network security.
The technical exploitation of this vulnerability stems from insufficient validation and authentication mechanisms within the TFTP/BOOTP auto configuration implementation. When devices attempt to fetch configuration information via TFTP, they rely on the TFTP server to provide valid configuration parameters. However, the flaw permits attackers to either intercept or manipulate these TFTP responses, thereby injecting malicious configuration data that could alter network settings, authentication parameters, or operational behaviors of the affected devices. This represents a classic case of insecure configuration management where the device's trust in the TFTP server is not adequately validated, creating a pathway for privilege escalation and configuration tampering.
The operational impact of this vulnerability extends beyond simple configuration changes to encompass potential network compromise and device control. Attackers could leverage this vulnerability to redirect device traffic to malicious servers, modify network access controls, or disable security features within the device. The implications are particularly severe in enterprise environments where multifunction devices serve as critical components of network infrastructure, potentially providing attackers with persistent access points or enabling lateral movement within the network. The vulnerability's scope across multiple version lines including 12.x, 13.x, and 14.x indicates a systemic issue in the device firmware rather than a localized bug, suggesting that organizations with these devices across their network infrastructure face widespread exposure.
Security practitioners should consider this vulnerability in the context of the CWE-284 access control weakness classification, which specifically addresses improper access control mechanisms that allow unauthorized modifications to system resources. The ATT&CK framework would categorize this vulnerability under the T1068 privilege escalation technique, as it enables attackers to modify device settings that could provide elevated access privileges or control over the device's operational parameters. Organizations should implement network segmentation to isolate these devices from critical network segments, deploy TFTP server monitoring to detect unauthorized configuration changes, and ensure prompt firmware updates to address the vulnerability. Additionally, the use of secure boot mechanisms and network access controls that restrict TFTP traffic to trusted servers would significantly reduce the risk of exploitation. The vulnerability underscores the importance of validating all network configuration sources and implementing proper authentication mechanisms for automatic configuration processes, as outlined in industry best practices for secure device management and network security protocols.