CVE-2023-6144 in Dev Blog
Summary
by MITRE • 11/21/2023
Dev blog v1.0 allows to exploit an account takeover through the "user" cookie. With this, an attacker can access any user's session just by knowing their username.
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Analysis
by VulDB Data Team • 12/15/2023
The vulnerability described in CVE-2023-6144 represents a critical account takeover flaw within the Dev blog v1.0 application that directly compromises user session integrity and authorization mechanisms. This weakness enables attackers to bypass normal authentication procedures by manipulating the "user" cookie, effectively allowing them to impersonate any user account within the system. The vulnerability stems from inadequate session management and insufficient validation of authentication tokens, creating a pathway for unauthorized access to user resources and data.
The technical implementation of this flaw involves the application's reliance on a predictable or improperly secured user cookie value that directly maps to user identifiers. When an attacker knows a valid username, they can manipulate the "user" cookie value to reference that specific user account, thereby gaining unauthorized access to their session and associated privileges. This type of vulnerability typically occurs when applications store user identifiers directly in cookies without proper cryptographic protection or when the cookie values are generated using predictable algorithms. The flaw aligns with CWE-384, which addresses session fixation and weak session management practices, and represents a direct violation of secure authentication principles outlined in OWASP Top Ten.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables attackers to perform actions with the privileges of any compromised user account. This includes but is not limited to accessing sensitive user data, modifying personal information, performing transactions, and potentially escalating privileges within the application. The vulnerability creates a persistent threat since attackers can maintain access to compromised accounts without requiring additional authentication factors. From an attack framework perspective, this flaw maps to ATT&CK technique T1566.001 for credential harvesting and T1078.004 for valid accounts, as it leverages existing user credentials through session manipulation rather than brute force or credential theft.
Mitigation strategies for this vulnerability must address both the immediate security gap and establish robust session management practices. Organizations should implement secure session handling mechanisms including the use of cryptographically secure random session identifiers, proper session invalidation upon logout, and the implementation of secure cookie attributes such as HttpOnly, Secure, and SameSite flags. The application should employ proper session regeneration after authentication and implement additional authentication factors such as multi-factor authentication to reduce the impact of session hijacking. Regular security testing including penetration testing and code reviews should be conducted to identify similar session management flaws. Additionally, implementing proper input validation and authentication token verification can prevent the exploitation of predictable cookie values. The remediation process should also include monitoring for suspicious session activity and implementing rate limiting to prevent automated exploitation attempts. Organizations must ensure that all user sessions are properly validated and that cookie values are not directly tied to user identifiers without appropriate cryptographic protection.