Vulnerability in usbnet: sanity check for maxpacket
Summary
GSD-2021-1001986: usbnet: sanity check for maxpacket. Affects Kernel versions < 002d82227c0abe29118cf80f7e2f396b22d448ed. No fix is published. How to fix ↓
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Background
The usbnet package is a part of the Linux Kernel ecosystem and is responsible for providing USB networking functionality. It allows devices to communicate over USB connections. The package handles various aspects of USB networking, including data transmission and reception. However, a vulnerability has been discovered in the package's sanity check for maxpacket.
Vulnerability Detail
The vulnerability in usbnet arises from a lack of proper sanity checks for the maxpacket value. This value represents the maximum packet size that can be transmitted or received over USB. Without adequate validation, an attacker could manipulate this value to cause buffer overflows or other memory-related issues. Exploiting this vulnerability could lead to arbitrary code execution, denial of service, or other malicious activities. The vulnerability has been fixed in Linux Kernel version v4.19.215 by commit 002d82227c0abe29118cf80f7e2f396b22d448ed.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Linux Kernel is not immediately feasible, a temporary workaround can be implemented by manually applying the fix introduced in commit 002d82227c0abe29118cf80f7e2f396b22d448ed. The specific code changes can be found in the commit's diff on the official Linux Kernel repository. By applying these changes to the affected system, the vulnerability can be addressed until a proper kernel update is performed.
Conclusion
In conclusion, the usbnet package in the Linux Kernel is vulnerable to a sanity check bypass for maxpacket. This vulnerability can be mitigated by updating the kernel to version v4.19.215 or later. Alternatively, a temporary workaround can be applied by manually applying the fix introduced in commit 002d82227c0abe29118cf80f7e2f396b22d448ed. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
usbnet is a package in the Linux Kernel ecosystem that enables USB networking functionality, allowing devices to communicate over USB connections.
Exploiting this vulnerability could lead to arbitrary code execution, denial of service, or other malicious activities.
Yes, the vulnerability has been fixed in Linux Kernel version v4.19.215 by commit 002d82227c0abe29118cf80f7e2f396b22d448ed.
To fix this vulnerability, update the Linux Kernel to version v4.19.215 or later by downloading the updated kernel source code and compiling it according to the provided instructions.
Yes, a temporary workaround can be implemented by manually applying the fix introduced in commit 002d82227c0abe29118cf80f7e2f396b22d448ed. Details can be found in the commit's diff on the official Linux Kernel repository.
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