Vulnerability in Kernel package: Fix link down processing to address NULL pointer dereference
Summary
GSD-2021-1002333: scsi: lpfc: Fix link down processing to address NULL pointer dereference. Affects Kernel versions < 28de48a7cea495ab48082d9ff4ef63f7cb4e563a. No fix is published. How to fix ↓
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Background
The Kernel package is a crucial component of the Linux operating system. It provides the core functionality and acts as an interface between the hardware and software layers. The package includes various drivers and modules that enable communication with different hardware devices. One of these modules is the lpfc module, which is responsible for handling SCSI (Small Computer System Interface) commands for Fibre Channel devices. The lpfc module is vulnerable to a NULL pointer dereference issue when processing link down events.
Vulnerability Detail
The vulnerability in the lpfc module occurs when handling link down events. A NULL pointer dereference can occur, leading to a system crash or potential privilege escalation. An attacker could exploit this vulnerability by sending specially crafted SCSI commands to a vulnerable system. Successful exploitation could result in a denial of service or potentially allow an attacker to execute arbitrary code with kernel-level privileges. The vulnerability has been assigned the ID GSD-2021-1002333 and is fixed in Linux Kernel version v5.15.5 by commit 28de48a7cea495ab48082d9ff4ef63f7cb4e563a.
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 necessary to apply the fix by updating the Linux Kernel package.
Conclusion
The vulnerability in the Kernel package's lpfc module can lead to system crashes or potential privilege escalation. It is crucial to update the Linux Kernel package to version v5.15.5 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a system crash or potential privilege escalation. An attacker could exploit this vulnerability to execute arbitrary code with kernel-level privileges.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there is no known public exploit for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely. An attacker can send specially crafted SCSI commands to a vulnerable system to trigger the NULL pointer dereference issue.
The only effective mitigation for this vulnerability is to apply the fix by updating the Linux Kernel package to version v5.15.5 or later.
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