CVE-2005-0735 in newsscript
Summary
by MITRE
newsscript.pl for NewsScript allows remote attackers to gain privileges by setting the mode parameter to admin.
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Analysis
by VulDB Data Team • 11/20/2024
The vulnerability identified as CVE-2005-0735 affects newsscript.pl, a web-based news management system that was widely used in the early 2000s for hosting online discussion forums and news articles. This particular flaw represents a critical privilege escalation vulnerability that allows remote attackers to elevate their access rights within the system. The vulnerability stems from improper input validation and access control mechanisms within the script's authentication and authorization framework, specifically in how it handles the mode parameter during user session management. When an attacker manipulates the mode parameter to admin, the system fails to properly verify whether the requesting user possesses legitimate administrative privileges, thereby allowing unauthorized access to administrative functions and potentially full system control.
The technical implementation of this vulnerability lies in the script's failure to properly validate user credentials and session states before granting administrative access. The newsscript.pl application appears to rely on a parameter-based access control mechanism where the mode parameter determines the user's operational level within the system. When an attacker sets this parameter to admin, the application incorrectly processes this request without performing adequate authentication checks or privilege verification, creating a path for unauthorized users to assume administrative roles. This type of vulnerability falls under CWE-285, which addresses improper authorization issues, and represents a classic example of insecure direct object reference vulnerability where the application directly uses user-supplied input to determine access levels without proper validation. The flaw demonstrates poor input sanitization and inadequate access control enforcement, creating a significant security gap in the application's authentication system.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with comprehensive administrative control over the news management system. Once an attacker successfully exploits this vulnerability, they can access sensitive administrative functions including user management, content modification, database access, and potentially system-level configurations. This access could enable data theft, content manipulation, user account compromise, and even system compromise if the application shares system resources or has database access privileges. The remote nature of the attack means that an attacker does not need physical access to the system or local network connectivity, making the vulnerability particularly dangerous as it can be exploited from anywhere on the internet. The vulnerability affects the confidentiality, integrity, and availability of the system's data and services, representing a significant risk to organizations relying on this legacy news management platform.
Organizations affected by this vulnerability should implement immediate mitigations including applying the latest available patches from the software vendor, if available, or implementing network-level restrictions to limit access to the vulnerable script. The most effective immediate solution involves modifying the application code to properly validate the mode parameter against legitimate user sessions and implement robust authentication checks before granting administrative privileges. Network segmentation and firewall rules should be configured to restrict access to the vulnerable script to only trusted administrative networks. Additionally, implementing proper input validation, using parameterized queries, and enforcing proper access control mechanisms can prevent similar vulnerabilities from occurring in the future. The vulnerability highlights the importance of following secure coding practices and implementing defense-in-depth strategies, including regular security audits and penetration testing to identify and remediate such critical flaws before they can be exploited by malicious actors. Organizations should also consider migrating away from legacy systems that lack proper security updates and support to more modern, secure platforms that adhere to current security standards and best practices.