CVE-2008-6855 in Absolute News Feed
Summary
by MITRE
Xigla Software Absolute News Feed 1.0 and possibly 1.5 allows remote attackers to bypass authentication and gain administrative access by setting a certain cookie.
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Analysis
by VulDB Data Team • 11/09/2024
The vulnerability identified as CVE-2008-6855 affects Xigla Software Absolute News Feed version 1.0 and potentially 1.5, representing a critical authentication bypass flaw that enables remote attackers to escalate privileges and gain administrative access to the affected system. This issue stems from improper cookie handling within the application's authentication mechanism, creating a pathway for unauthorized users to assume administrative roles without proper credentials. The vulnerability is particularly concerning as it allows remote exploitation, meaning attackers do not require physical access or local network presence to exploit the flaw. The affected software likely implements a cookie-based session management system where specific cookie values can be manipulated to grant elevated privileges. This type of vulnerability typically occurs when applications fail to properly validate or sanitize cookie data before using it to determine user permissions, creating a direct bypass of the intended authentication controls.
The technical implementation of this vulnerability involves the manipulation of authentication cookies that are typically used to maintain user sessions and track administrative privileges within the news feed management system. When an attacker can set a specific cookie value that corresponds to administrative access, they effectively circumvent the normal authentication flow that should require valid credentials before granting elevated permissions. This flaw likely exists in the application's session management code where cookie values are directly interpreted without sufficient validation or authorization checks. The vulnerability may be related to weak input validation mechanisms that fail to properly sanitize cookie data, allowing crafted cookie values to be accepted as legitimate administrative tokens. This represents a classic case of insecure session management where cookie contents are not adequately verified against expected values or user permissions.
The operational impact of this vulnerability is severe and far-reaching, as it allows remote attackers to completely compromise the affected news feed system. Once authenticated as an administrator, an attacker gains full control over the application's functionality, including the ability to modify or delete news feeds, alter content, add or remove users, and potentially access sensitive data stored within the system. The remote exploitation capability means that attackers can target the vulnerable system from anywhere on the internet without requiring local network access or physical presence. This vulnerability directly impacts the confidentiality, integrity, and availability of the affected system, as unauthorized users can manipulate content, potentially introducing malicious data or removing legitimate news feeds. The compromise of administrative access also creates potential for further lateral movement within networks where the vulnerable system might be deployed, as administrators often have elevated privileges and access to other network resources.
Organizations affected by this vulnerability should immediately implement mitigations including updating to a patched version of the Absolute News Feed software, implementing proper cookie validation mechanisms, and reviewing all session management code for similar flaws. The remediation process should include strengthening authentication controls by ensuring that cookie values are properly validated against expected patterns and that administrative privileges are never granted based solely on cookie manipulation. Security measures should also include implementing proper input sanitization and validation for all cookie data, as well as monitoring for unusual authentication patterns or unauthorized access attempts. This vulnerability aligns with CWE-287 which addresses improper handling of authentication tokens and authentication bypass issues, and it maps to ATT&CK technique T1078 for valid accounts and privilege escalation through unauthorized access to administrative functions. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts and to block known malicious cookie values that could be used to exploit this vulnerability.