CVE-2021-0342 is classified as a medium-severity vulnerability affecting the Android kernel. This vulnerability allows for potential memory corruption due to a use-after-free condition in the tun_get_user function. The CVSS score is 6.7, indicating a medium level of risk. Given its nature, it poses a significant risk to organizations utilizing the affected Android products, particularly since it enables local escalation of privileges.
The vulnerability requires System execution privileges but does not necessitate user interaction for exploitation, which increases its potential impact. Organizations should prioritize patching immediately to prevent unauthorized access and potential exploitation.
The vulnerability was published on January 11, 2021, and has been modified as of November 21, 2024. It is associated with CWE-416, indicating issues related to memory corruption. Since there is currently no public proof of concept or known exploit, the exploitation status remains uncertain, but vigilance is necessary.
In summary, organizations using Android products must be aware of CVE-2021-0342 and act swiftly to remediate the potential risks posed by this vulnerability.
Vulnerability Details
In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. User interaction is not required for exploitation. Product: Android; Versions: Android kernel; Android ID: A-146554327.
Technical Analysis
The root cause of this vulnerability lies in a memory management error, specifically a use-after-free condition, which can lead to memory corruption. The attack vector is local, meaning that an attacker must have access to the affected system to exploit this vulnerability. The attack complexity is low, and it requires high privileges to perform the exploit. No user interaction is necessary for exploitation, which further enhances the risk.
The confidentiality, integrity, and availability impacts are all rated as high, indicating that successful exploitation could lead to significant disruption and compromise of sensitive information.
Risk & Impact Analysis
The risk to organizations includes potential unauthorized access and manipulation of system resources, which could lead to broader impacts across the organization. The blast radius for this vulnerability could be extensive, particularly for environments dependent on the Android kernel. With a CVSS score of 6.7, organizations should address this vulnerability in their priority patch cycle.
Additionally, organizations should consider the implications of a successful exploitation, which may not only impact individual systems but also compromise the integrity of their overall network environment.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of the Android kernel prior to the vendor patch. Organizations should ensure they are using the latest versions to mitigate this risk.
Mitigation & Remediation
Organizations should implement the latest patches provided by Google to remediate this vulnerability. For detailed guidance on effective security measures, organizations can refer to existing resources on penetration testing to identify similar weaknesses in their systems.
Detection Guidance
Organizations should monitor for unusual memory usage patterns and potential unauthorized access attempts. Log indicators and behavioral anomalies can provide critical insights into potential exploitation of this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2021-0342 represents a growing trend of vulnerabilities associated with memory management errors in widely used operating systems. This highlights the importance of robust security practices, including regular updates and thorough testing of software. Organizations must remain vigilant against such vulnerabilities, ensuring they have a proactive approach to security.
For further reading on strengthening your security posture, consider reviewing related articles on vulnerability management and implementing effective penetration testing methodologies to safeguard your systems against future threats.
To further enhance security, organizations should also engage in continuous security assessments and consider the benefits of API security best practices in their overall 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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