CVE-2018-9082 in NAS
Summary
by MITRE
For some Iomega, Lenovo, LenovoEMC NAS devices versions 4.1.402.34662 and earlier, the password changing functionality available to authenticated users does not require the user's current password to set a new one. As a result, attackers with access to the user's session tokens can change their password and retain access to the user's account
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 03/28/2020
This vulnerability affects a critical authentication mechanism in network attached storage devices manufactured by Iomega, Lenovo, and LenovoEMC. The flaw exists in firmware versions 4.1.402.34662 and earlier, where the password change functionality operates without requiring the user to provide their current password. This represents a fundamental failure in the authentication flow that violates established security principles and creates significant access control risks. The vulnerability is classified under CWE-305 Authentication Bypass Using Alternate Input, as it allows unauthorized password changes through alternative authentication paths.
The technical implementation of this flaw permits authenticated users to modify their passwords without validating their existing credentials. When an attacker successfully steals a valid session token from a legitimate user, they can leverage this weakness to change the user's password and maintain persistent access to the compromised account. This creates a dangerous scenario where session hijacking becomes a pathway to account takeover, as the attacker can effectively lock out the legitimate user while maintaining access to the system. The vulnerability essentially eliminates the password change security check that should serve as a protective barrier against unauthorized modifications.
The operational impact of this vulnerability extends beyond simple account compromise, as it provides attackers with a persistent foothold within the network infrastructure. Network attached storage devices typically contain sensitive organizational data, making them attractive targets for attackers seeking long-term access. The ability to change passwords without current credential verification means that even if session tokens are rotated or expire, attackers can still maintain access by simply changing the password to one they know. This vulnerability particularly affects enterprise environments where NAS devices serve as data repositories and are often less scrutinized than other network components. The issue aligns with attack patterns documented in the MITRE ATT&CK framework under T1078 Valid Accounts and T1566 Phishing, as it enables attackers to maintain access after initial compromise through credential manipulation.
Organizations should immediately update affected devices to the latest firmware versions provided by the manufacturers to address this vulnerability. Network segmentation and monitoring of authentication events can help detect unauthorized password changes, while implementing multi-factor authentication where possible can provide additional protection layers. Regular security assessments of network attached storage devices should include verification of authentication mechanisms to ensure proper credential validation. The vulnerability also highlights the importance of session management practices and the need for robust authentication controls in all network services. Security teams should review their incident response procedures to account for potential password change attacks and ensure proper account recovery processes are in place to assist users who may have been compromised.