CVE-2007-4070 in Solaris
Summary
by MITRE
Unspecified vulnerability in Low Bandwidth X proxy (lbxproxy) on Sun Solaris 8 through 10 before 20070725 allows local users to read arbitrary files with root group ownership via unknown vectors.
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Analysis
by VulDB Data Team • 07/23/2019
The vulnerability identified as CVE-2007-4070 represents a critical security flaw within the Low Bandwidth X proxy component of Sun Solaris operating systems. This proxy serves as a network layer for X11 connections, enabling efficient communication over low bandwidth networks while maintaining the standard X11 protocol compatibility. The vulnerability specifically affects versions of Solaris 8 through 10, with the patch release of 20070725 addressing the issue. The flaw manifests as an unspecified weakness that enables local users to access files that should normally be restricted to root group ownership, creating a significant privilege escalation vector within the system.
The technical nature of this vulnerability stems from improper access controls within the lbxproxy implementation, allowing unauthorized local users to bypass normal file system permissions and read files that are specifically owned by the root group. This type of flaw typically involves inadequate input validation or improper privilege handling within the proxy's file access mechanisms. The vulnerability operates through unknown vectors, suggesting that the attack surface may involve multiple pathways including socket communications, file descriptor handling, or process privilege management within the X11 proxy subsystem. Such unspecified vectors often indicate complex interactions between multiple system components that can be exploited through indirect means.
The operational impact of this vulnerability extends beyond simple information disclosure, as it enables local users to access sensitive system files that are typically protected from unauthorized access. Files owned by the root group often contain critical system information, configuration data, or authentication credentials that could provide attackers with additional attack vectors or system insights. This vulnerability effectively undermines the principle of least privilege by allowing local users to access resources that should only be available to the root user or specific privileged processes. The implications for system security are substantial, as it creates a persistent backdoor that could be leveraged to escalate privileges, access sensitive data, or establish further footholds within the system.
Mitigation strategies for CVE-2007-4070 should prioritize the immediate application of the vendor-supplied patch released on 20070725, which specifically addresses the access control flaw in lbxproxy. System administrators should also implement additional security measures including regular monitoring of file access patterns, implementing proper discretionary access controls, and conducting thorough security audits of X11 proxy configurations. The vulnerability aligns with CWE-284, which covers improper access control, and can be mapped to ATT&CK technique T1068, involving exploit for privilege escalation through local system access. Organizations should also consider implementing network segmentation to limit local user access to critical system components and establish robust logging mechanisms to detect unauthorized file access attempts. The remediation process should include comprehensive testing of the patched environment to ensure that legitimate functionality remains intact while eliminating the security vulnerability.