A use-after-free vulnerability was discovered in BusyBox v.1.36.1 via a crafted awk pattern in the awk.c copyvar function. This vulnerability has been classified with a CVSS score of 5.5, indicating medium severity. The potential for exploitation exists, particularly due to its local attack vector, which may allow attackers to manipulate memory usage in unintended ways.
Risk to organizations includes significant availability impact, as the vulnerability could lead to crashes or instability of the BusyBox environment. Additionally, user interaction is required to exploit this vulnerability, which adds a layer of complexity for attackers. Despite a low probability of exploitation, the availability impact remains a concern, necessitating prompt action from organizations.
The urgency for defenders is moderate; organizations should schedule remediation in their patch cycles to mitigate the risk associated with this vulnerability. Although no known exploits currently exist, proactive measures should be taken to ensure systems are secured against potential future threats.
With the vulnerability published on November 27, 2023, it is crucial for organizations using BusyBox v.1.36.1 to take note and apply the necessary updates as they become available.
Vulnerability Details
The vulnerability allows for a use-after-free condition, which can lead to a system crash or other unpredictable behavior. The CVSS score of 5.5 indicates that it is considered medium severity due to its local attack vector and low attack complexity. The vulnerability affects BusyBox v.1.36.1, which is widely utilized in various embedded systems and applications.
The vulnerability can be exploited if a crafted awk pattern is provided to the system, targeting the awk.c copyvar function. Organizations should be particularly vigilant in environments where BusyBox is deployed.
The vulnerability was officially published on November 27, 2023, and the CWE classification associated with this issue is CWE-416, which denotes use-after-free vulnerabilities.
Technical Analysis
The root cause of this vulnerability stems from improper memory management within the BusyBox application. Specifically, the use-after-free condition arises when the application attempts to access memory that has already been freed. This can result in the application crashing or behaving unpredictably.
The attack vector is local, meaning that an attacker must have physical or remote command-line access to the affected system. The attack complexity is low, indicating that an attacker may exploit the vulnerability with minimal effort once they have the required access.
The privileges required to exploit this vulnerability are none, meaning that any user can potentially trigger the flaw. User interaction is required to exploit the vulnerability, which necessitates that the user executes a crafted awk command. The availability impact is high, as the vulnerability can cause the application to crash.
Risk & Impact Analysis
Real-world deployment of BusyBox in critical systems means that this vulnerability poses a risk to organizations, particularly those relying on BusyBox for essential functions. The potential blast radius includes any systems running the affected version, which could lead to service disruptions if exploited.
Organizations should evaluate the urgency based on the CVSS score of 5.5, which indicates that while the risk is medium, it should not be ignored. Patch cycles should prioritize this vulnerability, and systems should be monitored for any unusual behavior that could suggest exploitation.
It is essential for organizations to have incident response plans in place that can quickly address potential exploitation attempts. Additionally, organizations should be aware of the broader trends in vulnerabilities, as seen in the current landscape of security threats.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects BusyBox version 1.36.1. Organizations using this version should take immediate steps to upgrade or apply patches as they become available.
Mitigation & Remediation
Organizations should prioritize patching BusyBox to the latest version to mitigate this vulnerability. The latest release includes fixes for this issue. If immediate patching is not possible, consider implementing workarounds such as restricting user permissions and isolating vulnerable systems from untrusted inputs. Configuration hardening and network controls may also reduce exposure.
For further information on effective security practices, organizations can refer to penetration testing services that can help identify vulnerabilities.
Detection Guidance
Organizations should monitor logs for indicators of exploitation attempts, including unusual access patterns or command execution involving the awk command. Behavioral anomalies in system performance may also indicate exploitation of this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-42365 lies in its representation of the ongoing challenges associated with memory management vulnerabilities. This pattern highlights the need for organizations to adopt robust testing and validation measures, particularly in software development environments.
Security teams should learn from this incident to enhance their vulnerability management programs and ensure that thorough testing is conducted prior to deployment. The strategic takeaway is to prioritize security in the software development lifecycle and to remain vigilant against similar vulnerabilities.
For further guidance on vulnerability management, organizations can consult the following resources: vulnerability management program, penetration testing methodology, and API penetration testing best practices.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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