CVE-2008-6858 in Absolute Banner Manager.net
Summary
by MITRE
Absolute Banner Manager .NET 4.0 allows remote attackers to bypass authentication and gain administrative access by setting a cookie to a certain value.
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Analysis
by VulDB Data Team • 11/09/2024
The CVE-2008-6858 vulnerability affects Absolute Banner Manager .NET 4.0, a web application designed for managing digital banners and advertisements. This vulnerability represents a critical authentication bypass flaw that could allow remote attackers to escalate privileges and gain administrative access to the system. The issue stems from improper validation of authentication tokens within the application's cookie handling mechanism, creating a pathway for unauthorized users to assume administrative roles without proper credentials.
The technical flaw manifests through the application's insecure cookie management implementation where specific cookie values can be manipulated to bypass the standard authentication checks. When an attacker sets a particular cookie value, the system fails to properly validate the session state and grants administrative privileges to the unauthorized user. This vulnerability directly relates to CWE-287 which addresses improper authentication issues in software applications. The flaw demonstrates a classic case of insufficient session management where the application relies on client-side cookie values without adequate server-side verification mechanisms.
The operational impact of this vulnerability is severe as it provides attackers with complete administrative control over the banner management system. Once authenticated, an attacker could modify banner content, add malicious advertisements, delete existing banners, and potentially access sensitive configuration data. The remote nature of the attack means that an attacker does not need physical access to the network or system, making this vulnerability particularly dangerous in environments where the application is exposed to untrusted networks. This type of vulnerability can be exploited through various attack vectors including web browser manipulation, automated tools, or social engineering techniques that trick users into setting the malicious cookie value.
Mitigation strategies for CVE-2008-6858 should focus on implementing robust session management practices and proper cookie validation mechanisms. Organizations should immediately patch the application to the latest version that addresses this authentication bypass vulnerability, as the original software appears to be outdated and no longer supported. Server-side session validation should be strengthened to ensure that cookie values are properly verified against legitimate session tokens before granting administrative privileges. The implementation of secure cookie attributes including HttpOnly, Secure, and SameSite flags can prevent client-side manipulation of authentication cookies. Additionally, monitoring and logging of authentication attempts should be enhanced to detect suspicious cookie manipulation activities. This vulnerability aligns with ATT&CK technique T1078 which covers legitimate credentials use and privilege escalation through session hijacking or authentication bypass methods. Organizations should also consider implementing network segmentation and access controls to limit exposure of such vulnerable applications to external threats.