CVE-2007-6098 in SIParator
Summary
by MITRE
Ingate Firewall before 4.6.0 and SIParator before 4.6.0 do not log truncated (1) ICMP, (2) UDP, and (3) TCP packets, which has unknown impact and remote attack vectors; and do not log (4) serial-console login attempts with nonexistent usernames, which might make it easier for attackers with physical access to guess valid login credentials while avoiding detection.
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Analysis
by VulDB Data Team • 09/11/2018
The vulnerability identified in CVE-2007-6098 affects Ingate Firewall versions prior to 4.6.0 and SIParator versions prior to 4.6.0, representing a significant logging deficiency that undermines security monitoring capabilities. This issue stems from incomplete packet logging mechanisms that fail to record truncated network traffic across multiple protocol types including ICMP, UDP, and TCP communications. The absence of logging for these truncated packets creates blind spots in network security monitoring systems, as attackers can potentially exploit this weakness to conduct stealthy attacks while remaining undetected by security infrastructure. The vulnerability specifically impacts the integrity of network traffic analysis and forensic investigations, as critical information about potential malicious activity is not captured in the system's audit trails.
The technical flaw manifests in the failure of the affected systems to properly log truncated packets that exceed maximum transmission unit limits or are intentionally fragmented by attackers. When network packets are truncated due to size limitations or deliberate fragmentation attacks, the systems should maintain comprehensive logs to enable security analysts to detect anomalous network behavior patterns. However, the incomplete logging mechanism means that these truncated packets are silently discarded without proper audit trail documentation, creating opportunities for attackers to perform reconnaissance or execute attacks without leaving detectable evidence. This issue particularly affects the defense-in-depth strategy of network security architectures, as the loss of packet-level information weakens the overall security posture.
The operational impact of this vulnerability extends beyond simple logging deficiencies to encompass significant security risks for organizations relying on these firewall systems. The missing logs for truncated packets can enable attackers to conduct persistent surveillance or execute advanced persistent threat campaigns without detection, as their network traffic patterns remain hidden from security monitoring tools. Additionally, the failure to log serial-console login attempts with nonexistent usernames creates a specific attack vector for physical access threats, where malicious actors with physical proximity to the devices can attempt credential guessing without triggering security alerts. This particular weakness is especially concerning for environments where physical security controls may be insufficient, as it provides attackers with a method to enumerate valid user accounts through repeated login attempts while remaining undetected.
The vulnerability aligns with CWE-778, which addresses insufficient logging of security-relevant events, and represents a gap in the principle of least privilege and audit logging requirements. From an ATT&CK framework perspective, this vulnerability enables techniques such as credential access through brute force and defense evasion by avoiding detection mechanisms. The lack of comprehensive logging for network traffic patterns also impacts threat hunting capabilities and incident response procedures, as security teams lose visibility into potential attack vectors. Organizations may experience difficulties in conducting proper security audits and compliance verification processes due to incomplete audit trails. The vulnerability demonstrates the critical importance of maintaining complete logging mechanisms for all network events, particularly those involving protocol-level anomalies that could indicate malicious activity. This issue underscores the necessity of robust logging policies and proper implementation of security monitoring systems that can detect and record all relevant network activities to maintain effective security posture.
The recommended mitigations include immediate upgrade to Ingate Firewall version 4.6.0 or later and SIParator version 4.6.0 or later to address the logging deficiencies. Organizations should also implement additional monitoring controls to compensate for the missing logging capabilities while awaiting the upgrade. Security teams must establish procedures to manually verify and validate network traffic patterns through alternative means, particularly focusing on serial console access controls and user authentication monitoring. Network administrators should consider implementing network segmentation and access controls to limit the potential impact of physical access attacks, while also ensuring that all authentication attempts, regardless of validity, are properly logged through alternative mechanisms. Regular security assessments should be conducted to identify similar logging gaps in other network infrastructure components to maintain comprehensive security coverage and prevent exploitation of similar vulnerabilities across the organization's security infrastructure.