Improper Fix in ax25 Package Leads to UAF and NPD Bugs
Summary
GSD-2022-1000327: ax25: improve the incomplete fix to avoid UAF and NPD bugs. Affects Kernel versions < 3072e72814de56f3c674650a8af98233ddf78b19. No fix is published. How to fix ↓
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Background
The ax25 package is a component of the Linux Kernel, which is responsible for implementing the AX.25 protocol. This protocol is used for packet radio systems and allows for communication between amateur radio stations. The ax25 package provides the necessary functionality for transmitting and receiving data over AX.25 networks. However, a vulnerability has been identified 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 is a result of an incomplete fix. The fix was intended to address a specific issue but inadvertently introduced UAF and NPD bugs. These bugs can be exploited by an attacker to execute arbitrary code or cause a denial of service. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in the Linux Kernel version v4.19.231 by commit 3072e72814de56f3c674650a8af98233ddf78b19.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. The recommended course of action is to apply the fix by updating the Linux Kernel.
Conclusion
The ax25 package in the Linux Kernel is vulnerable to UAF and NPD bugs due to an incomplete fix. It is recommended to update the Linux Kernel to version v4.19.231 or later to mitigate 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 implements the AX.25 protocol for packet radio systems.
The impact of this vulnerability is not yet proven, but it could potentially allow an attacker to execute arbitrary code or cause a denial of service.
To fix this vulnerability, update the Linux Kernel to version v4.19.231 or later.
There is no specific workaround mentioned for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel.
Yes, this vulnerability has been fixed in the Linux Kernel version v4.19.231 by commit 3072e72814de56f3c674650a8af98233ddf78b19.
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