Vulnerability in Kernel package: ip_gre: test csum_start instead of transport header
Summary
GSD-2022-1003718: ip_gre: test csum_start instead of transport header. Affects Kernel versions >= 3d32ce5472bb2ca720bef84089b85f76a705fd1a, < 3d08bc3a5d9b2106f5c8bcf1adb73147824aa006. No fix is published. How to fix ↓
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Background
The Kernel package is a fundamental component of the Linux operating system, responsible for managing the system's core functionality. It provides essential services such as process management, memory management, and device drivers. The ip_gre module within the Kernel package is responsible for handling IP-over-GRE (Generic Routing Encapsulation) tunnels. These tunnels allow the encapsulation of IP packets within GRE headers, enabling the transmission of IP traffic over non-IP networks. However, a vulnerability has been discovered in the ip_gre module that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in the ip_gre module arises from a flaw in the handling of checksum calculation. Specifically, the module incorrectly tests the 'csum_start' field instead of the transport header, which may lead to incorrect checksum calculation. While the impact and attack plausibility of this vulnerability have not been proven, it could potentially result in network communication issues or even enable attackers to bypass certain security measures. This vulnerability was introduced in version v5.4.148 of the Linux Kernel and has been fixed in version v5.4.198.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
In conclusion, a vulnerability has been identified in the Kernel package's ip_gre module, potentially leading to network communication issues or security bypasses. It is crucial to update the Linux Kernel package to version v5.4.198 or later to mitigate this vulnerability. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability could range from network communication issues to potential security bypasses.
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 and the Vulert Playground will analyze it for any open-source vulnerabilities, including this one.
There is no evidence to suggest that this vulnerability has been exploited in the wild at this time.
The recommended mitigation is to update the Linux Kernel package to the fixed version v5.4.198 or later.
You can find more information about this vulnerability in the GSD-2022-1003718 entry of the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1003xxx/GSD-2022-1003718.json).
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