A heap-buffer-overflow was discovered in BusyBox version 1.36.1, specifically in the next_token function located at awk.c:1159. This vulnerability allows attackers to exploit memory management errors, which can potentially lead to arbitrary code execution or application crashes. With a CVSS score of 5.5, this vulnerability is classified as medium severity, highlighting the importance of timely remediation.
The risk to organizations includes potential disruptions in service availability due to this flaw. Given that the attack vector is local, the threat is primarily from users who have direct access to the affected system. User interaction is required to trigger the vulnerability, thus slightly reducing the risk profile.
Organizations should prioritize patching immediately. Ensuring that systems are updated to the latest version of BusyBox is crucial to mitigate this vulnerability and protect against possible exploitation.
As of now, no public exploits have been confirmed, and the vulnerability has not been classified as actively exploited or included in the Known Exploited Vulnerabilities (KEV) catalog.
Vulnerability Details
The official description of CVE-2023-42366 indicates that it involves a heap-buffer-overflow in the BusyBox application. The Common Weakness Enumeration (CWE) classification for this vulnerability is CWE-787, which denotes improper handling of buffer size leading to overflow conditions.
The CVSS score of 5.5 suggests a medium level of risk, characterized by a local attack vector, low attack complexity, no privileges required, and user interaction needed to trigger the vulnerability. The possible impacts include a high availability impact, while confidentiality and integrity impacts are rated as none.
This vulnerability was published on November 27, 2023. Organizations using BusyBox version 1.36.1 should take immediate action to assess their systems and apply any available patches.
Technical Analysis
The root cause of this vulnerability lies in inadequate memory management within the BusyBox source code. Specifically, the next_token function fails to properly validate input sizes, which enables a heap overflow when processing certain inputs.
The attack vector is local, implying that an attacker must have direct access to the system where BusyBox is running. The attack complexity is classified as low, as it requires straightforward execution of malicious inputs, particularly in environments where user interaction is present.
The vulnerability requires no privileges to exploit, which enhances its risk as any local user could potentially trigger it. User interaction is required, meaning that the attacker would need the victim to execute a crafted input, thus increasing the difficulty slightly.
The impact on availability is rated high, indicating that successful exploitation could lead to service outages or crashes. However, there is no impact on confidentiality or integrity, as the vulnerability does not facilitate unauthorized data access or modification.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant, especially in environments where BusyBox is widely utilized. The direct access requirement mitigates some risk, but local users with malicious intent could exploit this flaw to compromise system availability.
Organizations need to understand the potential blast radius of this vulnerability. If exploited, it could lead to widespread service disruptions, particularly in critical infrastructure relying on BusyBox for essential operations.
Given the medium CVSS score and the lack of active exploitation reports, organizations are advised to schedule remediation in their patch management cycles. However, urgency should be placed on addressing this vulnerability, especially in environments where BusyBox is mission-critical.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected version for this vulnerability is BusyBox 1.36.1. Organizations running this version should take immediate action to apply the appropriate patches. If version information is not available, it is advisable to consider all versions prior to vendor patch.
Mitigation & Remediation
Organizations should prioritize the application of patches for BusyBox to remediate this vulnerability. For those unable to immediately apply patches, temporary workarounds may include restricting access to the BusyBox application and monitoring for unusual activity. Additionally, configuration hardening can reduce the attack surface, while implementing network controls can help limit exposure.
For further guidance on penetration testing and vulnerability management, organizations should refer to the penetration testing best practices to ensure a robust security posture.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for abnormal behaviors or access patterns. System changes should be closely scrutinized, and network signatures that correlate with BusyBox operations should be established.
AppSecure Threat Intelligence Insight
This vulnerability underscores the ongoing challenges in managing memory safety in software development. Security teams should recognize the patterns of such vulnerabilities and incorporate lessons learned into their development processes. Implementing rigorous testing and validation methods can help prevent similar issues in the future.
For further reading on vulnerability management best practices, consider exploring our vulnerability management program and the importance of continuous security assessments to stay ahead of potential threats.
Additionally, organizations can benefit from understanding the nuances of penetration testing methodology to enhance their security posture.
Finally, understanding the implications of vulnerabilities like CVE-2023-42366 is crucial for developing a proactive security strategy.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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