Integer Overflow Vulnerability in bpf Package
Summary
UVI-2021-1001584: bpf: Fix integer overflow in prealloc_elems_and_freelist(). Affects Kernel versions >= 557c0c6e7df8e14a46bd7560d193fa5bbc00a858, < b14f28126c51533bb329379f65de5b0dd689b13a. No fix is published. How to fix ↓
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Background
The bpf package is a component of the Linux Kernel, which is responsible for implementing Berkeley Packet Filters (BPF). BPF provides a framework for executing custom programs within the kernel, primarily used for network packet filtering and analysis. It allows users to define and attach BPF programs to various kernel subsystems, enabling efficient and flexible packet processing. However, a vulnerability has been discovered in the bpf package that could potentially lead to security issues.
Vulnerability Detail
The identified vulnerability in the bpf package is an integer overflow in the prealloc_elems_and_freelist() function. This function is responsible for preallocating elements and creating a freelist for BPF maps. The integer overflow occurs when calculating the number of elements to allocate, leading to a potential buffer overflow or memory corruption. An attacker could exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition. The vulnerability was introduced in version v4.6 of the Linux Kernel and has been fixed in version v5.4.153.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The integer overflow vulnerability in the bpf package of the Linux Kernel could allow attackers to execute arbitrary code or cause a denial-of-service condition. It is recommended to update the Linux Kernel to version v5.4.153 or later to fix this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability could allow an attacker to execute arbitrary code or cause a denial-of-service condition.
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 to the playground, and it will analyze and alert you in real-time.
No specific workaround has been provided for this vulnerability. It is recommended to update to the fixed version of the Linux Kernel.
The vulnerability was introduced in version v4.6 of the Linux Kernel and has been fixed in version v5.4.153.
There are no known exploits for this vulnerability at the moment. However, it is crucial to update to the fixed version to mitigate any potential risks.
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