tipc: skb_linearize the head skb when reassembling msgs
Summary
GSD-2021-1000674: tipc: skb_linearize the head skb when reassembling msgs. Affects Kernel versions >= 45c8b7b175ceb2d542e0fe15247377bf3bce29ec, < 436d650d374329a591c30339a91fa5078052ed1e. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system. It provides the core functionality and interfaces for the system's hardware and software components. The tipc module in the Kernel is responsible for providing Transparent Inter-Process Communication (TIPC) between nodes in a cluster. TIPC allows processes on different nodes to communicate with each other seamlessly. However, a vulnerability has been discovered in the tipc module that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in the tipc module arises from a failure to skb_linearize the head skb when reassembling messages. This can lead to a memory corruption issue, potentially allowing an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition. The vulnerability was introduced in version v4.3 of the Linux Kernel and has been fixed in version v4.14.235.
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 possible workaround is to apply a patch that addresses the specific vulnerability. The patch can be obtained from the official Linux Kernel repository and applied manually. However, it is recommended to update to the latest stable release as soon as possible to ensure comprehensive security.
Conclusion
The tipc vulnerability in the Linux Kernel can pose a significant security risk, potentially allowing attackers to execute arbitrary code or cause a denial-of-service condition. It is crucial to update the Kernel to the fixed version or apply the provided patch as soon as possible. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can potentially allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition on a system running the affected version of the Linux Kernel.
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.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the necessary updates or patches to mitigate the risk.
Yes, this vulnerability can be exploited remotely if the affected system is accessible over a network. Attackers can potentially send specially crafted messages to trigger the memory corruption issue.
The primary mitigation for this vulnerability is to update the Linux Kernel to the fixed version. Applying the patch or workaround mentioned earlier can provide temporary protection until the update is performed.
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