This vulnerability allows an attacker to exploit a DLL hijacking vulnerability in Rufus versions 4.6.2208 and earlier. The severity of this vulnerability is classified as medium with a CVSS score of 6.8. The risk to organizations includes the potential for unauthorized access to system resources with elevated privileges. As such, organizations should prioritize patching immediately. There are currently no known workarounds available for this vulnerability.
The CVE was published on February 18, 2025, and involves the injection of a malicious `cfgmgr32.dll` file into the same directory as the Rufus executable. This executed DLL can lead to privilege escalation since the executable has already been granted higher privileges during launch. The vulnerability is addressed in commit `74dfa49`, which will be included in the upcoming version 4.7.
Given the nature of this vulnerability, organizations should be vigilant in monitoring their systems for any anomalies that could indicate exploitation attempts. Regular updates and patch management are essential to mitigate risks associated with this type of vulnerability.
The urgency for defenders is clear, and organizations are advised to check for updates and be prepared to apply the patch as soon as it is released.
Vulnerability Details
According to the official description, "Rufus is a utility that helps format and create bootable USB flash drives. A DLL hijacking vulnerability in Rufus 4.6.2208 and earlier versions allows an attacker loading and executing a malicious DLL with escalated privileges due to the ability to inject a malicious `cfgmgr32.dll` in the same directory as the executable and have it side load automatically." The CVSS score of 6.8 indicates a medium severity level, suggesting that while the vulnerability is not trivial, it is not the most critical either.
The affected product is Rufus, with version 4.6.2208 and earlier being vulnerable. The vulnerability was disclosed on February 18, 2025 and has been assigned the CWE-426 and CWE-427 classifications.
Technical Analysis
The root cause of this vulnerability lies in the way Rufus handles DLL loading. The attack vector is local, meaning an attacker must have local access to inject the malicious DLL. The complexity of the attack is low, as it does not require extensive skills or knowledge to exploit. The process requires low privileges to execute, and user interaction is passive since the DLL is loaded automatically upon execution of Rufus.
This vulnerability poses a high confidentiality and integrity impact, as an attacker could manipulate the system to execute arbitrary code with escalated privileges. The availability impact is none. The lack of known public exploits further emphasizes that the vulnerability, while serious, is not currently a widespread threat.
Risk & Impact Analysis
Real-world deployment risk is significant for organizations using affected versions of Rufus, particularly in environments where USB drives are frequently used for booting and installation purposes. The blast radius potential is considerable, as multiple systems could be affected if an attacker successfully exploits the vulnerability. The urgency assessment based on the CVSS score suggests organizations should address this vulnerability in their priority patch cycle to prevent potential exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions include Rufus 4.6.2208 and earlier. Users are advised to upgrade to version 4.7 as soon as it becomes available, as this version will contain the fix for the identified vulnerability.
Mitigation & Remediation
Organizations should actively monitor for the release of version 4.7 of Rufus, as it will contain the necessary fixes for this vulnerability. If immediate upgrading is not possible, ensure that systems are configured to limit the ability for unauthorized DLL injection, though no official workarounds are currently available. Additionally, regular security assessments can help identify and mitigate risks associated with DLL hijacking.
For more guidance on securing systems against vulnerabilities, organizations can refer to penetration testing services.
Detection Guidance
To detect attempts to exploit this vulnerability, organizations should monitor for unusual file access patterns, especially in directories where Rufus is installed. Additionally, logging should be enabled to capture any unauthorized attempts to load DLLs. Behavioral anomalies in system performance may also indicate potential exploitation.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability underscores the importance of secure coding practices, particularly with respect to DLL management. As the prevalence of similar vulnerabilities increases, security teams must prioritize addressing these risks through comprehensive testing and regular updates.
For organizations using Rufus, this incident serves as a reminder of the potential risks associated with third-party utilities. Ensuring that applications are kept up to date and that security assessments are conducted regularly can mitigate risks. For more insights on application security, consider reviewing our articles on application security assessments and best practices in penetration testing methodology.
Furthermore, understanding the nature of privilege escalation vulnerabilities is crucial. Organizations should remain vigilant and proactive in applying security measures to protect against potential threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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