CVE-2008-5711 in PhotoUploader
Summary
by MITRE
Heap-based buffer overflow in the Facebook PhotoUploader ActiveX control 5.0.14.0 and earlier allows remote attackers to execute arbitrary code via a long FileMask property value.
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Analysis
by VulDB Data Team • 10/17/2024
The vulnerability identified as CVE-2008-5711 represents a critical heap-based buffer overflow within the Facebook PhotoUploader ActiveX control version 5.0.14.0 and earlier. This flaw exists in the handling of the FileMask property, which is designed to specify file patterns for photo uploads but becomes a vector for remote code execution when exploited. The ActiveX control operates within Microsoft Windows environments and is typically integrated into web browsers or desktop applications to facilitate Facebook photo uploading functionality. The buffer overflow occurs when the control processes an excessively long FileMask property value, causing memory corruption that can be leveraged by attackers to execute malicious code with the privileges of the affected user. This vulnerability falls under the Common Weakness Enumeration category CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations.
The technical exploitation of this vulnerability requires an attacker to construct a malicious payload containing an overly long FileMask property value that exceeds the allocated buffer space. When the vulnerable ActiveX control processes this input, it fails to perform adequate bounds checking, leading to memory corruption that can overwrite critical program execution structures. The heap-based nature of the overflow means that the attacker can potentially manipulate the heap memory layout to redirect program execution flow, typically through return-oriented programming or direct code injection techniques. This type of vulnerability is particularly dangerous in browser environments where ActiveX controls are executed with the privileges of the logged-in user, potentially enabling full system compromise without additional exploitation steps. The vulnerability aligns with ATT&CK technique T1190, which covers Exploit Public-Facing Application, as it represents a remote code execution vulnerability in a widely deployed application component.
The operational impact of CVE-2008-5711 extends beyond simple code execution, as it enables attackers to gain persistent access to affected systems through various attack vectors. A successful exploitation can result in complete system compromise, data theft, or establishment of backdoors for further malicious activities. The vulnerability affects systems running Windows operating systems with Internet Explorer and the vulnerable Facebook PhotoUploader ActiveX control installed, making it particularly concerning for enterprise environments where such controls might be deployed without proper security controls or updates. Organizations with legacy systems or those maintaining older versions of Facebook PhotoUploader software face significant risk, as the vulnerability was present in versions up to 5.0.14.0. The exploitability of this vulnerability is enhanced by the fact that ActiveX controls are often enabled by default in Internet Explorer, reducing the attack surface requirements for successful exploitation.
Mitigation strategies for CVE-2008-5711 must address both immediate remediation and long-term security posture improvements. The primary recommendation involves immediate patching of the Facebook PhotoUploader ActiveX control to versions that address the buffer overflow vulnerability, as provided by Facebook or the control vendor. System administrators should also implement security policies that disable ActiveX controls or restrict their execution to trusted sites only, reducing the attack surface for such vulnerabilities. Network-based mitigations can include firewall rules that block access to known vulnerable ActiveX control endpoints and web application firewalls that monitor for suspicious FileMask parameter values. Additionally, organizations should conduct comprehensive vulnerability assessments to identify all instances of the vulnerable ActiveX control across their network infrastructure. The remediation process should also include user education about the risks of executing untrusted ActiveX controls and the importance of keeping software updated. Security monitoring should be enhanced to detect potential exploitation attempts through anomalous file pattern processing or memory access patterns that may indicate buffer overflow attempts. This vulnerability demonstrates the importance of proper input validation and memory management practices, as outlined in industry standards such as the OWASP Top Ten and NIST Cybersecurity Framework, which emphasize the need for robust software security controls in preventing such critical vulnerabilities.