Vulnerability in Kernel package: iommu/vt-d: Fix sysfs leak in alloc_iommu()
Summary
GSD-2021-1000665: iommu/vt-d: Fix sysfs leak in alloc_iommu(). Affects Kernel versions >= 39ab9555c24110671f8dc671311a26e5c985b592, < 2ec5e9bb6b0560c90d315559c28a99723c80b996. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system that provides core functionality and acts as an interface between hardware and software. It includes various subsystems and modules that enable the proper functioning of the system. One of these subsystems is the iommu/vt-d, which is responsible for input-output memory management unit (IOMMU) support for Intel Virtualization Technology for Directed I/O (VT-d). This feature allows for efficient and secure device assignment in virtualized environments. However, a vulnerability has been discovered in the alloc_iommu() function of the iommu/vt-d subsystem, which can lead to a sysfs leak.
Vulnerability Detail
The vulnerability in the alloc_iommu() function of the iommu/vt-d subsystem allows an attacker to leak sensitive information through the sysfs interface. By exploiting this vulnerability, an attacker can gain unauthorized access to system data, potentially leading to further security breaches or information disclosure. The vulnerability was introduced in version v4.11 of the Linux Kernel and has been fixed in version v4.19.193. It is important to note that 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
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the Kernel package's iommu/vt-d subsystem is vulnerable to a sysfs leak in the alloc_iommu() function. This vulnerability can potentially lead to unauthorized access and information leakage. It is crucial to update the Linux Kernel package to version v4.19.193 or later to mitigate this vulnerability. If you have any further questions or need assistance, please contact DevNack.com.
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FAQ
The impact of this vulnerability is the potential leakage of sensitive information through the sysfs interface, which can be exploited by attackers to gain unauthorized access to system data.
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.
As of now, there are no known exploits for this vulnerability. However, it is important to apply the recommended fix as soon as possible to mitigate any potential risks.
The exact attack vector and remote exploitability of this vulnerability have not been proven yet. However, it is always recommended to apply security patches and updates to prevent any potential remote attacks.
For further support on vulnerability remediation and assistance with the Linux Kernel package, you can reach out to info@devnack.com.
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