Vulnerability in Kernel: bpf, arm64: Clear prog->jited_len along prog->jited
Summary
GSD-2022-1003263: bpf, arm64: Clear prog->jited_len along prog->jited. Affects Kernel versions >= db496944fdaaf2a67d2f60529f5dc23abf809506, < 3f4d5e727aeaa610688d46c9f101f78b7f712583. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and enforces security policies. The bpf (Berkeley Packet Filter) subsystem in the Kernel allows users to define and attach programs that can be used for various network-related tasks, such as packet filtering and traffic analysis. The arm64 architecture is specifically designed for 64-bit ARM processors. This vulnerability affects the bpf subsystem on arm64 architecture.
Vulnerability Detail
The vulnerability arises from a failure to clear the 'jited_len' field along with the 'jited' field in the 'prog' structure within the bpf subsystem on arm64 architecture. This oversight can potentially lead to security issues as the 'jited_len' field may contain sensitive information from previously executed programs. An attacker could exploit this vulnerability to gain unauthorized access, execute arbitrary code, or perform other malicious activities. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.47 or later. The fix for this vulnerability was implemented in commit 3f4d5e727aeaa610688d46c9f101f78b7f712583. You can obtain the updated Kernel from the official Linux Kernel repository: Linux Kernel Repository.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, this vulnerability in the Kernel's bpf subsystem on arm64 architecture could potentially lead to unauthorized access and execution of arbitrary code. It is crucial to update the Linux Kernel to version v5.15.47 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it could potentially allow attackers to gain unauthorized access, execute arbitrary code, or perform other malicious activities.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. It requires no signup and uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities.
Yes, a patch for this vulnerability is available in the Linux Kernel version v5.15.47. It is recommended to update to this version or later to fix the vulnerability.
There are no known exploits for this vulnerability at the moment. However, it is important to apply the patch or update to the fixed version to mitigate any potential risks.
You can find more information about this vulnerability in the vulnerability database maintained by the Cloud Security Alliance. Here is the source link: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1003xxx/GSD-2022-1003263.json
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