CVE-2008-7312 in Websense
Summary
by MITRE
The Filtering Service in Websense Enterprise 5.2 through 6.3 does not consider the IP address during URL categorization, which makes it easier for remote attackers to bypass filtering via an HTTP request, as demonstrated by a request to a compromised server associated with a specific IP address.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 02/19/2019
The vulnerability identified as CVE-2008-7312 resides within the Filtering Service component of Websense Enterprise software versions 5.2 through 6.3, representing a significant security flaw that undermines the integrity of web content filtering mechanisms. This issue stems from the service's failure to properly validate IP address information during URL categorization processes, creating a fundamental weakness in the system's ability to accurately determine content legitimacy. The flaw operates at the core of how the filtering service evaluates web requests, specifically by ignoring crucial IP address context that should be integral to determining whether a requested URL should be permitted or blocked.
The technical implementation of this vulnerability allows malicious actors to exploit the absence of IP address verification during URL classification, enabling them to bypass content filtering restrictions through carefully crafted HTTP requests. Attackers can leverage this weakness by directing requests to compromised servers that are associated with specific IP addresses, effectively circumventing the filtering service's intended protection mechanisms. This bypass occurs because the filtering service relies solely on URL-based categorization without cross-referencing the originating IP address, creating a scenario where malicious content can be accessed despite being flagged as inappropriate or restricted by traditional URL filtering methods.
The operational impact of CVE-2008-7312 extends beyond simple content bypass, as it fundamentally compromises the security posture of organizations relying on Websense Enterprise for network protection. This vulnerability creates an attack surface that allows unauthorized access to restricted content, potentially enabling data exfiltration, malware delivery, or access to inappropriate material in corporate or educational environments. The flaw particularly affects organizations with strict content filtering policies, as it undermines the effectiveness of their security controls and creates potential compliance violations in regulated environments where content filtering is mandated.
From a cybersecurity framework perspective, this vulnerability aligns with CWE-284, which addresses improper access control in software systems, and demonstrates characteristics consistent with ATT&CK technique T1071.004 for application layer protocol usage. The flaw represents a classic case of insufficient input validation where the system fails to properly validate all aspects of incoming requests, particularly the IP address component that should be considered alongside URL information. Organizations experiencing this vulnerability may find their network security policies rendered ineffective, as attackers can systematically bypass content restrictions by utilizing compromised servers with known IP addresses.
Mitigation strategies for CVE-2008-7312 require immediate attention through software updates and patches provided by Websense, as well as potential workarounds involving enhanced monitoring and additional filtering layers. Network administrators should implement comprehensive logging and monitoring to detect anomalous patterns that may indicate exploitation attempts, while also considering the deployment of supplementary security controls that can provide additional layers of protection. The vulnerability highlights the importance of thorough input validation and the necessity of considering all available request context information when implementing content filtering systems, particularly in environments where security controls must maintain strict enforcement of access policies.