Out of Bounds Write Vulnerability in Linux Packages - CVE-2020-0347
Summary
CVE-2020-0347: In iptables, there is a possible out of bounds write due to an incorrect bounds check. Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux package is a core component of the Debian operating system, providing essential functionalities for system operations and user applications. It is widely used across various distributions, including Debian 11, 12, and 13. This package is crucial for managing system resources, hardware interactions, and network communications. However, it is susceptible to vulnerabilities that can compromise system integrity and security.
Vulnerability Detail
CVE-2020-0347 is a vulnerability in iptables, a user-space utility program that allows a system administrator to configure the IP packet filter rules of the Linux kernel. The vulnerability arises from an incorrect bounds check, leading to a possible out of bounds write. This flaw could allow a local attacker to escalate privileges, potentially gaining system execution privileges without requiring user interaction. The severity of this vulnerability is underscored by its CVSS score of 6.7, indicating a moderate risk level.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If immediate patching is not possible, consider restricting access to the affected system and monitoring for any suspicious activity. Additionally, ensure that only trusted users have access to the system to mitigate potential exploitation of this vulnerability.
Conclusion
CVE-2020-0347 represents a significant security risk for users of the Linux package in Debian systems. It is crucial to address this vulnerability promptly by applying the necessary updates. Users should also consider using tools like Vulert to monitor for vulnerabilities in their applications effectively.
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FAQ
CVE-2020-0347 is a vulnerability in iptables that allows for an out of bounds write due to an incorrect bounds check, potentially leading to local privilege escalation.
The vulnerability affects Linux packages across Debian versions 11, 12, and 13.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The CVSS score for CVE-2020-0347 is 6.7, indicating a moderate level of risk.
If you cannot update immediately, restrict access to the system and monitor for any suspicious activities to mitigate the risk of exploitation.
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