TCP Sequence Number Guessing Vulnerability in Linux Packages
Summary
DEBIAN-CVE-2004-0230: TCP, when using a large Window Size, makes it easier for remote attackers to guess sequence numbers and cause a denial of service (connection loss) to persistent TCP connections by repeatedly injecting a TCP RST packet,... 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 package is a core component of the Debian operating system, providing essential functionalities for managing system resources and enabling communication over networks. It is widely used across various environments, including servers and personal computers. This package is crucial for maintaining system stability and performance, but it has been identified as vulnerable to a specific issue related to TCP connections, which can lead to denial of service attacks.
Vulnerability Detail
The vulnerability, identified as CVE-2004-0230, arises from the handling of TCP connections with large Window Sizes. This flaw allows remote attackers to predict TCP sequence numbers, enabling them to inject TCP RST packets. This can disrupt persistent TCP connections, particularly affecting protocols that rely on long-lived connections, such as BGP. The potential ramifications include service interruptions and loss of connectivity, which can severely impact network operations.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, consider implementing firewall rules to block unauthorized TCP RST packets or limit the exposure of services that utilize long-lived TCP connections. This can help mitigate the risk of exploitation until a proper patch is applied.
Conclusion
The CVE-2004-0230 vulnerability in the Linux package poses a significant risk to systems using Debian. It is essential to apply the necessary updates to mitigate the risk of denial of service attacks. Users should also consider implementing workarounds while awaiting patches. Monitoring tools like Vulert can assist in identifying vulnerabilities in your software.
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FAQ
CVE-2004-0230 is a vulnerability in the Linux package that allows remote attackers to disrupt TCP connections by guessing sequence numbers.
This vulnerability can lead to denial of service attacks, causing persistent TCP connections to drop and affecting network services.
If you are using Debian versions 11, 12, 13, or 14, your system may be affected. It is crucial to check for updates and apply patches.
If immediate updates are not possible, consider implementing firewall rules to limit exposure to the vulnerability as a temporary measure.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using just a manifest file like package-lock.json. You can check your application for vulnerabilities without signup at the Vulert playground.
References
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