Null Pointer Dereference in net/x25 Package
Summary
GSD-2022-1002426: net/x25: Fix null-ptr-deref caused by x25_disconnect. Affects Kernel versions >= f0b6ce595c397a91d5b62c6b0b5ea93b84191795, < 858642789ada1b48630f322e59416ca9fca3e6b7. No fix is published. How to fix ↓
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Background
The net/x25 package is a component of the Linux Kernel, which is responsible for handling X.25 network protocol connections. X.25 is an older networking protocol that was widely used in the past for packet-switched communication over long distances. The net/x25 package provides the necessary functionality to establish and manage X.25 connections within the Linux Kernel. However, a vulnerability has been discovered in this package that can lead to a null pointer dereference.
Vulnerability Detail
The vulnerability in the net/x25 package is caused by a null pointer dereference when invoking the x25_disconnect function. This vulnerability can be triggered by an attacker who has the ability to send specially crafted packets to a vulnerable system. By exploiting this vulnerability, an attacker may be able to crash the system or potentially execute arbitrary code with kernel-level privileges. The vulnerability was introduced in version v4.14.192 of the Linux Kernel and has been fixed in version v4.14.276.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is recommended to apply the fix as soon as possible.
Conclusion
The net/x25 package in the Linux Kernel is vulnerable to a null pointer dereference, which can be exploited by an attacker to crash the system or execute arbitrary code with kernel-level privileges. It is recommended to update the Linux Kernel to version v4.14.276 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The net/x25 package is a component of the Linux Kernel that handles X.25 network protocol connections.
X.25 is an older networking protocol that was widely used in the past for packet-switched communication over long distances.
A null pointer dereference occurs when a program attempts to access or manipulate data using a null pointer, which does not point to a valid memory location. This can lead to crashes or other unexpected behavior.
An attacker can exploit this vulnerability by sending specially crafted packets to a vulnerable system, triggering a null pointer dereference and potentially crashing the system or executing arbitrary code with kernel-level privileges.
Yes, this vulnerability has been fixed in version v4.14.276 of the Linux Kernel.
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