Memory Disclosure Vulnerability in Linux Kernel - CVE-2024-49997
Summary
CVE-2024-49997: In the Linux kernel, the following vulnerability has been resolved: net: ethernet: lantiq_etop: fix memory disclosure When applying padding, the buffer is not zeroed, which results in memory disclosure. Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interaction. It manages system resources, memory, and processes, ensuring efficient operation. This vulnerability specifically affects the Ethernet driver for Lantiq ETOP, which is responsible for handling Ethernet frames. The driver has been identified to have a flaw that may lead to memory disclosure, potentially exposing sensitive data.
Vulnerability Detail
CVE-2024-49997 is a vulnerability in the Linux kernel's Ethernet driver for Lantiq ETOP, where the buffer is not zeroed when applying padding to Ethernet frames. This oversight can lead to memory disclosure, as uninitialized memory may be transmitted over the network. The vulnerability arises from the improper handling of packet padding, which can result in sensitive data being exposed to unauthorized parties. The patch addresses this issue by utilizing the skb_put_padto() function, which ensures that the expanded buffer is zeroed before transmission. If padding cannot be applied, the packet is silently dropped, and statistics are not incremented, which may affect monitoring and logging.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can monitor their network traffic for any unusual data patterns that may indicate memory disclosure. However, the best course of action is to apply the patch as soon as it becomes available.
Conclusion
CVE-2024-49997 presents a significant risk due to memory disclosure in the Linux kernel's Ethernet driver. Users are strongly advised to update their systems to the patched version to mitigate this vulnerability. Monitoring tools like Vulert can assist in identifying potential vulnerabilities in your applications.
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FAQ
CVE-2024-49997 is a vulnerability in the Linux kernel's Ethernet driver that can lead to memory disclosure due to improper handling of packet padding.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without requiring any signup.
The primary risk is the exposure of sensitive data transmitted over the network, which could be intercepted by unauthorized users.
Yes, a patch has been developed and is available for the affected versions of the Linux kernel. Users should update their systems to the patched version.
If you cannot apply the patch immediately, monitor your network traffic for any anomalies and consider implementing additional security measures to protect sensitive data.
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