CVE-2008-6856 in Absolute News Manager.NET
Summary
by MITRE
Xigla Software Absolute News Manager.NET 5.1 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 vulnerability identified as CVE-2008-6856 affects Xigla Software Absolute News Manager.NET version 5.1, representing a critical authentication bypass flaw that exposes administrative privileges to remote attackers. This weakness stems from improper validation of authentication tokens within the application's cookie handling mechanism, allowing malicious actors to escalate their privileges without legitimate credentials. The vulnerability specifically targets the authentication process where the software relies on cookie values to maintain user session states and administrative access levels.
The technical implementation of this flaw involves the application's failure to properly validate the integrity and authorization status of cookie values during the authentication process. When an attacker manipulates the cookie value to a predetermined state, the system incorrectly accepts this modified token as valid administrative credentials. This represents a classic case of insufficient input validation and improper session management, where the application trusts client-side data without proper server-side verification. The vulnerability aligns with CWE-287, which addresses improper authentication issues, and demonstrates how weak cookie validation can lead to privilege escalation attacks.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with complete administrative control over the news management system. This includes the ability to modify content, add or remove users, alter system configurations, and potentially access sensitive data stored within the application. Remote attackers can exploit this vulnerability without requiring any prior authentication credentials, making it particularly dangerous in environments where the application is accessible over the internet. The attack vector is straightforward and requires minimal technical expertise, as it only involves cookie manipulation rather than complex exploitation techniques.
Security professionals should consider this vulnerability in relation to the ATT&CK framework's privilege escalation tactics, specifically the use of valid accounts and credential access techniques. The flaw enables attackers to leverage a legitimate authentication mechanism in an unintended manner, which aligns with techniques such as "Valid Accounts" and "Credential Access" categories. Organizations using this software should implement immediate mitigations including proper cookie validation, session management improvements, and regular security assessments to identify similar vulnerabilities in other applications. The vulnerability also highlights the importance of following secure coding practices and implementing proper input validation mechanisms to prevent unauthorized privilege escalation scenarios.