Integer Overflow Vulnerability in bpf Package
Summary
GSD-2021-1001553: bpf: Fix integer overflow in prealloc_elems_and_freelist(). Affects Kernel versions >= 557c0c6e7df8e14a46bd7560d193fa5bbc00a858, < 078cdd572408176a3900a6eb5a403db0da22f8e0. No fix is published. How to fix ↓
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Background
The bpf package is a component of the Linux Kernel ecosystem. It provides functionality for Berkeley Packet Filters (BPF), which are used for efficient packet filtering and network monitoring. BPF allows users to define custom programs that can be executed in the kernel context. These programs are commonly used in network-related applications, such as firewalls and traffic analyzers. However, a vulnerability has been discovered in the bpf package that could lead to potential security risks.
Vulnerability Detail
The identified vulnerability in the bpf package is an integer overflow issue in the prealloc_elems_and_freelist() function. This vulnerability was introduced in version v4.6 of the Linux Kernel and has been present until version v4.19.211. The integer overflow occurs when calculating the number of elements to preallocate for a BPF map. An attacker could exploit this vulnerability by providing a specially crafted input that triggers the overflow, potentially leading to memory corruption or arbitrary 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
No specific workaround has been mentioned for this vulnerability.
Conclusion
In conclusion, the bpf package in the Linux Kernel is vulnerable to an integer overflow issue in the prealloc_elems_and_freelist() function. To mitigate this vulnerability, it is recommended to update the kernel to version v4.19.211 or later. If you require further support or assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The bpf package is a component of the Linux Kernel ecosystem that provides functionality for Berkeley Packet Filters (BPF), commonly used in network-related applications.
The impact of this vulnerability is not yet proven, but it could potentially lead to memory corruption or arbitrary code execution.
To fix this vulnerability, update the Linux Kernel to version v4.19.211 or later.
No specific workaround has been mentioned for this vulnerability.
For more details about this vulnerability, refer to the provided references link.
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