CVE-2025-0374 is a medium-severity vulnerability affecting FreeBSD's etcupdate utility. This vulnerability allows unprivileged local users to access sensitive information due to improperly managed conflict files during updates. Specifically, when etcupdate encounters conflicts while merging files, it saves a version containing conflict markers in /var/db/etcupdate/conflicts. This version does not preserve the mode of the input file, making it world-readable. The exposed information includes encrypted root and user passwords from the temporary master.passwd file created in /var/db/etcupdate/conflicts.
The potential for unauthorized access to sensitive information presents a significant risk to organizations using FreeBSD. As this vulnerability can expose critical authentication details, organizations should prioritize remediation efforts. The CVSS score for this vulnerability is 6.5, indicating a medium severity level, and it is classified under CWE-732, which pertains to incorrect permission assignment.
As of now, no public exploits have been confirmed for CVE-2025-0374. However, organizations must remain vigilant as the risk of exploitation could increase if the vulnerability is not addressed promptly. The vulnerability was published on January 30, 2025, and it is marked as deferred, which necessitates immediate attention from security teams.
Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability. Regular updates and security assessments are essential to safeguard sensitive data.
Vulnerability Details
The official CVE description states that when etcupdate encounters conflicts while merging files, it saves a version containing conflict markers in /var/db/etcupdate/conflicts. This version does not preserve the mode of the input file and is world-readable. This applies to files that would normally have restricted visibility, such as /etc/master.passwd.
An unprivileged local user may be able to read encrypted root and user passwords from the temporary master.passwd file created in /var/db/etcupdate/conflicts. This is possible only when conflicts within the password file arise during an update, and the unprotected file is deleted when conflicts are resolved.
The CVSS score assigned to this vulnerability is 6.5, indicating medium severity. The attack vector is classified as network-based, with a low complexity requirement, and it requires low privileges for exploitation. The confidentiality impact is rated high, while integrity and availability impacts are rated as none.
The vulnerability was published on January 30, 2025, and is classified under CWE-732.
Technical Analysis
The root cause of CVE-2025-0374 lies in the handling of file conflicts during the update process. When etcupdate encounters a conflict, it creates a temporary file in a location that does not enforce strict access controls. This oversight allows local users to access sensitive information that should otherwise be restricted.
The attack vector is local, meaning that the attacker must have access to the system where FreeBSD is running. The complexity of the attack is low, and the attacker requires low privileges to exploit the vulnerability. User interaction is not required, as the attacker can exploit the vulnerability without any additional actions from the target user.
The confidentiality impact is high because an attacker could potentially access encrypted passwords that could lead to further system compromise. However, there is no integrity or availability impact associated with this vulnerability.
Risk & Impact Analysis
The real-world risk associated with CVE-2025-0374 is significant. Organizations that utilize FreeBSD may be exposing sensitive information to unprivileged local users due to improper file handling during the update process. The blast radius potential is considerable, as the vulnerability affects files that are critical for user authentication, such as /etc/master.passwd.
The urgency assessment based on the CVSS score of 6.5 indicates that organizations should address this vulnerability in their priority patch cycle. The lack of known exploits does not mitigate the need for prompt remediation, as the longer the vulnerability exists, the higher the likelihood of an attack surface expansion.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
As the vendor has not provided specific version information for CVE-2025-0374, it is advised to consider all versions prior to patching as potentially affected. Organizations should ensure they implement the latest updates to mitigate this vulnerability.
Mitigation & Remediation
To remediate CVE-2025-0374, organizations should prioritize patching to the latest version of FreeBSD that addresses this vulnerability. If a patch is unavailable, consider implementing access controls to restrict access to the /var/db/etcupdate/conflicts directory. Additionally, organizations should review their update processes to ensure that sensitive files are adequately protected during conflicts.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
To detect potential exploitation of CVE-2025-0374, organizations should monitor log files for unusual access patterns to the /var/db/etcupdate/conflicts directory. Behavioral anomalies related to unauthorized access attempts should also be logged and investigated. Additionally, network signatures indicating access to sensitive files should be implemented to notify security teams of potential breaches.
AppSecure Threat Intelligence Insight
CVE-2025-0374 highlights the importance of robust file permission management, especially during system updates. This vulnerability illustrates how oversight can lead to significant risks in sensitive data exposure. Organizations should regularly assess their file handling processes to prevent similar vulnerabilities.
It is crucial for security teams to engage in proactive measures, such as implementing strict access controls and validating update processes, to mitigate risks associated with vulnerabilities like CVE-2025-0374. Security training for employees on the importance of data protection can also reduce the likelihood of exploitation.
For further insights on vulnerability management, organizations can refer to the following resources:
vulnerability management program and penetration testing methodology guides to enhance security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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