CVE-2007-2970 in R3000 Internet Filter
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in cgi/block.cgi in 8e6 R3000 Internet Filter allow remote attackers to inject arbitrary web script or HTML via the (1) URL, (2) CAT, and (3) USER parameters. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 09/02/2017
The vulnerability identified as CVE-2007-2970 represents a critical cross-site scripting flaw in the 8e6 R3000 Internet Filter's cgi/block.cgi component. This security weakness resides in the web application's input validation mechanisms, specifically within the handling of URL, CAT, and USER parameters that are processed through the block.cgi script. The vulnerability classifies under CWE-79 as a failure to sanitize user input, creating an environment where malicious actors can execute arbitrary web scripts or HTML code within the context of other users' browsers.
The technical implementation of this vulnerability stems from the application's insufficient sanitization of parameters passed to the block.cgi script. When users interact with the internet filter's web interface, the URL, CAT, and USER parameters are directly incorporated into the web response without proper validation or encoding. This allows attackers to craft malicious payloads that, when processed by the vulnerable application, get executed in the browsers of legitimate users who subsequently access the filtered content. The attack vector operates entirely through web-based communication channels, requiring no local system access or privileged accounts.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to perform session hijacking, steal user credentials, redirect victims to malicious sites, or deface the web interface itself. The 8e6 R3000 Internet Filter serves as a network security appliance designed to control and monitor internet access within organizations, making this vulnerability particularly dangerous as it could compromise the entire filtering system's integrity. The implications are especially severe in enterprise environments where the filter controls access to sensitive corporate resources and user data.
Organizations affected by this vulnerability should immediately implement input validation controls that sanitize all parameters before processing, including the implementation of proper HTML encoding for user-supplied content. The recommended mitigations include deploying web application firewalls that can detect and block XSS attempts, applying the latest firmware updates from the vendor, and implementing strict access controls to limit exposure of the vulnerable web interface. Security professionals should also consider the ATT&CK framework's T1059.001 technique for command and scripting interpreter execution, as this vulnerability could enable attackers to establish persistent access through malicious scripts injected via the XSS payload. The vulnerability demonstrates the critical importance of input validation in network security appliances and highlights the need for comprehensive security testing of web-based administrative interfaces in enterprise filtering solutions.