CVE-2025-46394 is a low-severity vulnerability affecting BusyBox through version 1.37.0. This vulnerability allows TAR archives to conceal filenames from a listing by utilizing terminal escape sequences. The CVSS score of this vulnerability is 3.2, which highlights its low impact potential. However, it is crucial for organizations using BusyBox to understand the implications of this issue.
The vulnerability's classification indicates a local attack vector, requiring high attack complexity, and it does not necessitate any privileges or user interaction. The potential for attackers to leverage this flaw could lead to scenarios where sensitive files within TAR archives remain undetected, posing a risk to data integrity.
Organizations should prioritize addressing this vulnerability in their patch management cycles. Although the exploitability is considered low, the risk to organizations includes the possibility of unintentional data exposure or manipulation. Immediate remediation is advisable to ensure that TAR archives do not become a vector for hidden data.
As of now, there is no known public exploit, and the vulnerability is not actively exploited in the wild. However, organizations should remain vigilant and monitor any updates from BusyBox regarding this issue. The urgency for patching is rated low, allowing for scheduled remediation in routine maintenance.
Vulnerability Details
The official description of CVE-2025-46394 states: 'In tar in BusyBox through 1.37.0, a TAR archive can have filenames hidden from a listing through the use of terminal escape sequences.' This vulnerability is classified under CWE-451, indicating an issue with the visibility of filenames.
The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N, reflecting a low severity level with a potential integrity impact and no confidentiality or availability impact.
Organizations utilizing BusyBox should be aware that all versions prior to the vendor patch are affected by this vulnerability.
Technical Analysis
The root cause of this vulnerability lies within the way BusyBox's tar command processes filenames within TAR archives. By employing terminal escape sequences, filenames can be rendered invisible in a listing, which can lead to potential misuse of the archives without the awareness of the user or system administrators.
The attack vector is classified as local, meaning an attacker must have access to the system where BusyBox is deployed. Additionally, the attack complexity is high, indicating that successfully exploiting this vulnerability would require specific conditions to be met.
No privileges are required to exploit this vulnerability, and user interaction is not necessary, making it easier for an attacker to execute potential attacks. However, it is important to note that the confidentiality impact is none, while the integrity impact is low.
Organizations should regularly audit their use of BusyBox and monitor for any unusual activities related to archive manipulation. Implementing strict access controls and monitoring practices can help mitigate the risk associated with this vulnerability.
Risk & Impact Analysis
Risk to organizations includes the potential for data integrity issues due to hidden files in TAR archives. While the exploitation status is currently low, the possibility of future exploitation cannot be entirely ruled out. Organizations should take proactive measures to ensure that they are not inadvertently allowing sensitive information to be concealed.
The blast radius, while limited, could still have significant ramifications for organizations that rely on BusyBox for critical operations. With the low urgency for patching, organizations can incorporate remediation into their regular maintenance cycles, but they should remain aware of potential emerging threats.
Given the CVSS score of 3.2 and the absence of active exploitation, organizations should still make this vulnerability a part of their vulnerability management program. Regular reviews of their BusyBox deployments will help maintain a secure environment.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of BusyBox prior to 1.37.0 are affected by this vulnerability. Organizations should ensure they have upgraded to the latest version to mitigate the risks associated with this issue.
Mitigation & Remediation
Organizations should prioritize upgrading to the latest version of BusyBox to mitigate this vulnerability. Those unable to apply the patch should consider implementing workarounds such as restricting access to TAR files and monitoring the integrity of archive contents.
Configuration hardening should be undertaken to limit the exposure of BusyBox components, and organizations may also implement network controls to monitor unauthorized access to TAR archives.
Monitoring for behavioral anomalies related to archive manipulations can provide early warnings of potential exploitation attempts, which is critical in maintaining a secure posture.
For further insights on effective testing methods, organizations should consider engaging in penetration testing to identify security gaps.
Detection Guidance
Organizations should monitor logs for indicators of unauthorized access to TAR archives and watch for behavioral anomalies that may suggest attempts to exploit this vulnerability. Additionally, network signatures related to file access and modification should be established to detect suspicious activities.
System changes should also be monitored, particularly in environments where BusyBox is deployed, to identify any unexpected alterations that could indicate exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-46394 highlights the importance of maintaining robust security practices around archive management, particularly in environments that utilize BusyBox extensively. This vulnerability represents a broader trend of misconfigurations leading to data exposure risks.
Security teams should take this opportunity to assess their archive handling policies and ensure they align with best practices. Implementing strict access controls and regular audits can help prevent similar vulnerabilities from being exploited in the future.
This case serves as a reminder that even low-severity vulnerabilities can have significant impacts if left unaddressed. Organizations should adopt a proactive approach to vulnerability management, ensuring continuous monitoring and timely remediation.
For more information on vulnerability management and best practices, organizations can refer to our vulnerability management program design. Additionally, exploring our penetration testing methodology can provide insights into effective assessment strategies.
In conclusion, CVE-2025-46394 serves as a reminder that vigilance is crucial in maintaining a secure environment, and organizations should remain proactive in their security efforts.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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