Incomplete Fix in ax25 Package Leads to UAF and NPD Bugs
Summary
GSD-2022-1000311: ax25: improve the incomplete fix to avoid UAF and NPD bugs. Affects Kernel versions < a509dbde35fa51d140512cbcf50068a84fdb7aad. No fix is published. How to fix ↓
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Background
The ax25 package is a part of the Linux Kernel ecosystem. It provides support for the AX.25 protocol, which is used for packet radio communication. The package allows users to establish connections and exchange data over radio frequencies. However, a vulnerability has been discovered in the ax25 package that could lead to Use-After-Free (UAF) and Null Pointer Dereference (NPD) bugs.
Vulnerability Detail
The vulnerability in the ax25 package arises from an incomplete fix. It can potentially result in Use-After-Free (UAF) and Null Pointer Dereference (NPD) bugs. These bugs can be exploited by an attacker to execute arbitrary code, cause a denial of service, or gain unauthorized access to sensitive information. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The ax25 package in the Linux Kernel is vulnerable to Use-After-Free (UAF) and Null Pointer Dereference (NPD) bugs due to an incomplete fix. It is recommended to update the Linux Kernel to version v4.14.268 or later to address this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The ax25 package is a component of the Linux Kernel that provides support for the AX.25 protocol used in packet radio communication.
Use-After-Free (UAF) is a memory corruption bug where a program uses a pointer after it has been freed, leading to unexpected behavior or a crash. Null Pointer Dereference (NPD) occurs when a program tries to access or dereference a null pointer, resulting in a crash or undefined behavior.
Exploiting this vulnerability could allow an attacker to execute arbitrary code, cause a denial of service, or gain unauthorized access to sensitive information.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
To fix this vulnerability, update the Linux Kernel to version v4.14.268 or later, which includes the necessary patch for the ax25 package.
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