Open Source Vulnerability: Kernel - net: ipv6: unexport __init-annotated seg6_hmac_init()
Summary
GSD-2022-1002588: net: ipv6: unexport __init-annotated seg6_hmac_init(). Affects Kernel versions >= bf355b8d2c30a289232042cacc1cfaea4923936c, < 9ba4416b831eeb4d185e88e73488d1d21288e63a. 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 supports various subsystems. The vulnerability in question affects the IPv6 networking module of the Kernel, specifically the __init-annotated seg6_hmac_init() function.
Vulnerability Detail
The vulnerability arises from the improper export of the __init-annotated seg6_hmac_init() function in the IPv6 networking module of the Kernel. This function is intended for internal use only but was mistakenly made accessible externally. As a result, an attacker may be able to exploit this vulnerability to execute arbitrary code or perform other malicious activities. The impact and attack plausibility of this vulnerability have not been proven yet, but it is essential to address it to ensure the security and stability of the system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can manually modify the Kernel source code to remove the unintended export of the seg6_hmac_init() function. However, this approach requires a deep understanding of the Kernel's codebase and may introduce other issues or complications. It is strongly recommended to apply the official update instead of relying on manual modifications.
Conclusion
The vulnerability in the Kernel's IPv6 networking module, specifically the __init-annotated seg6_hmac_init() function, poses a potential security risk. It is crucial to update the Linux Kernel to version v5.18.4 or later to address this vulnerability. Applying the official update ensures the proper restriction of access to the affected function and helps maintain the security and stability of the system. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it has the potential to allow attackers to execute arbitrary code or engage in other malicious activities.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it in real-time.
At the time of this report, there is no known exploit for this vulnerability. However, it is crucial to apply the recommended update to mitigate any potential risks.
While a temporary workaround is mentioned in this report, it is strongly advised to apply the official update provided by the Linux Kernel maintainers. Workarounds may introduce complexities and potential issues.
For more detailed information about this vulnerability, including its technical aspects and the specific commits that address it, you can refer to the vulnerability's entry in the GSD database: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1002xxx/GSD-2022-1002588.json
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