CVE-2005-2891 in WebArchiveX
Summary
by MITRE
WebArchiveX.dll 5.5.0.76 installed before September 6th, 2005 is marked safe for scripting by default, which allows remote attackers to read or write to arbitrary files via the (1) MakeArchive or (2) MakeArchiveStr methods.
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Analysis
by VulDB Data Team • 05/17/2025
The vulnerability identified as CVE-2005-2891 represents a critical security flaw in the WebArchiveX.dll component version 5.5.0.76 that was installed prior to September 6th, 2005. This issue stems from the component's default configuration that explicitly marks the DLL as safe for scripting, a designation that inadvertently creates a dangerous attack vector for remote adversaries. The vulnerability specifically affects two methods within the component: MakeArchive and MakeArchiveStr, both of which can be exploited to perform unauthorized file operations on the target system. The flaw demonstrates a classic case of improper privilege management and insecure default configurations that have been widely documented in security frameworks and best practices.
The technical implementation of this vulnerability exploits the scripting safety mechanism that is typically employed to prevent malicious code execution within web environments. When WebArchiveX.dll is configured as safe for scripting, it grants elevated permissions to the calling code that can manipulate file system operations without proper validation or authorization checks. Attackers can leverage this by invoking the MakeArchive or MakeArchiveStr methods with malicious parameters that specify arbitrary file paths, enabling them to read sensitive files from the system or write malicious content to targeted locations. This represents a direct violation of the principle of least privilege and demonstrates how default security configurations can become attack surfaces when not properly reviewed and hardened.
The operational impact of this vulnerability extends beyond simple file access, as it provides attackers with the capability to perform arbitrary file system operations that can lead to complete system compromise. Remote attackers can use this vulnerability to read configuration files, user data, or system files that may contain sensitive information such as passwords, credentials, or system configurations. The ability to write arbitrary files opens additional attack vectors including the potential to deploy malicious payloads, modify system binaries, or establish persistence mechanisms. This vulnerability directly aligns with attack patterns described in the attack technique matrix under techniques such as file system access and privilege escalation, making it particularly dangerous in enterprise environments where web applications may be exposed to untrusted network traffic.
Security mitigation strategies for CVE-2005-2891 should focus on immediate remediation through software updates and configuration hardening. Organizations must ensure that affected versions of WebArchiveX.dll are updated to patched releases that remove or properly restrict the scripting safety designation for this component. System administrators should also implement additional controls including restricting the execution of potentially dangerous methods, implementing proper input validation for file paths, and ensuring that web applications do not execute with elevated privileges. The vulnerability highlights the importance of secure coding practices and proper security configuration management, aligning with industry standards such as those outlined in the CWE database under categories related to insecure default configurations and improper privilege management. Organizations should also consider implementing network segmentation and monitoring to detect potential exploitation attempts and maintain proper security posture through regular vulnerability assessments and patch management processes.