CVE-2007-0533 in IntraWeb component
Summary
by MITRE
The AToZed IntraWeb component 8.0 and earlier for Borland Delphi and Kylix, and IntraWeb 9.0 before build (9.0.12), allows remote attackers to cause a denial of service (thread hang or CPU consumption) via a crafted HTTP request, related to the OnBeforeDispatch function in the TIWServerController object.
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Analysis
by VulDB Data Team • 10/06/2017
The vulnerability identified as CVE-2007-0533 affects the AToZed IntraWeb component suite, specifically versions 8.0 and earlier for Borland Delphi and Kylix, along with IntraWeb 9.0 before build 9.0.12. This issue represents a significant security concern within web application frameworks that utilize the IntraWeb component for building dynamic web interfaces. The vulnerability stems from improper handling of HTTP requests within the framework's server-side processing mechanisms, creating a pathway for malicious actors to disrupt service availability through carefully crafted requests.
The technical flaw manifests in the OnBeforeDispatch function of the TIWServerController object, which serves as a critical interception point for incoming HTTP requests within the IntraWeb framework. When processing malformed or specially constructed HTTP requests, this function fails to properly validate or sanitize input parameters, leading to thread hanging conditions or excessive CPU consumption. The vulnerability operates by exploiting the component's request processing logic, causing the web server threads to either become indefinitely blocked or consume disproportionate computational resources, effectively rendering the affected application unavailable to legitimate users.
From an operational impact perspective, this vulnerability creates a reliable denial of service condition that can be exploited by remote attackers without requiring authentication or privileged access. The attack vector is particularly dangerous because it can be executed through standard HTTP requests, making it easily accessible to attackers with minimal technical expertise. The resulting service disruption can have cascading effects on business operations, particularly for applications that depend on continuous availability. Network administrators and security teams must consider the potential for this vulnerability to be used as part of broader attack campaigns targeting web applications.
The vulnerability aligns with CWE-400, which categorizes the weakness as "Uncontrolled Resource Consumption," and demonstrates characteristics consistent with the ATT&CK technique T1499.1, specifically "Endpoint Denial of Service" through resource exhaustion. Organizations utilizing affected versions of IntraWeb components should implement immediate mitigations including updating to patched versions, implementing request rate limiting, and deploying intrusion detection systems to monitor for suspicious HTTP request patterns. Additionally, network segmentation and firewall rules can help limit the attack surface by restricting access to vulnerable components and implementing proper input validation at network boundaries to prevent exploitation attempts.