NULL pointer dereference in convert_variable_location() in perf probe
Summary
UVI-2021-1000764: perf probe: Fix NULL pointer dereference in convert_variable_location(). Affects Kernel versions >= 66f69b2197167cb99330c77a550da50f1f597abc, < 091283e3d5eb9f424b85e71804fc26092c3c4915. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system. It provides the core functionality and interfaces for the system's hardware and software components. The perf probe tool, included in the Kernel package, allows users to dynamically instrument code for performance analysis. It enables the insertion of probes into running processes to collect data and analyze performance. However, a vulnerability has been identified in the convert_variable_location() function of perf probe, which can lead to a NULL pointer dereference.
Vulnerability Detail
The vulnerability in convert_variable_location() function of perf probe arises due to a NULL pointer dereference. This occurs when the function attempts to access a memory location using a pointer that is not initialized or points to NULL. An attacker could exploit this vulnerability by providing a crafted input, causing the function to dereference a NULL pointer and resulting in a system crash or potential code execution. 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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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the NULL pointer dereference vulnerability in convert_variable_location() of perf probe in the Kernel package can lead to system crashes or potential code execution. It is crucial to update the Linux Kernel package to version v5.10.43 or later to address this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the attacker's capabilities and the system's configuration. It could lead to a system crash or potentially allow an attacker to execute arbitrary code.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there is no known exploit for this vulnerability. However, it is crucial to apply the recommended fix to mitigate any potential risks.
The exploitability of this vulnerability remotely depends on various factors, including the system's network configuration and the attacker's access to the target system. It is advisable to apply the fix as soon as possible to minimize the risk of remote exploitation.
The recommended solution is to update the Linux Kernel package to the latest version. However, if updating is not feasible, you can consider implementing additional security measures, such as restricting access to the affected component or using intrusion detection systems to monitor for potential exploitation attempts.
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