Libsoup: Denial Of Service Attack To Websocket Server

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Introduction

Libsoup is a C library for working with HTTP, which is used in various applications, including web browsers and other network-enabled software. However, a recent vulnerability has been discovered in libsoup, which can lead to a denial of service (DoS) attack on WebSocket servers. In this article, we will discuss the details of the vulnerability, its impact, and the affected packages.

Description of the Vulnerability

A flaw was found in libsoup, which can cause the SoupWebsocketConnection to accept a large WebSocket message. This can lead to libsoup allocating a large amount of memory, resulting in a denial of service (DoS) attack. The vulnerability is rated as high in terms of availability impact, with a CVSS score of 3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

CVSS Score

The CVSS score for this vulnerability is as follows:

  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): LOW
  • Privileges required (PR): NONE
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): NONE
  • Integrity impact (I): NONE
  • Availability impact (A): HIGH

Affected Packages

The following packages are affected by this vulnerability:

  • libsoup (2.74.3@nixos-24.11)
  • libsoup_3 (3.6.1@nixos-24.11, 3.6.4@nixos-unstable)
  • libsoup_2_4 (2.74.3@nixos-unstable)
  • gnome2.libsoup (2.74.3@nixos-24.11)
  • tests.pkg-config.defaultPkgConfigPackages."libsoup-gnome-2.4" (2.4@nixos-24.11)

Impact of the Vulnerability

The vulnerability can lead to a denial of service (DoS) attack on WebSocket servers, which can cause the server to allocate a large amount of memory and become unresponsive. This can result in a significant impact on the availability of the server and the services it provides.

Recommendations

To mitigate the vulnerability, it is recommended that affected package maintainers update their packages to the latest version. Additionally, users should ensure that their systems are up-to-date and that any affected packages are updated promptly.

Affected Package Maintainers

The following package maintainers are affected by this vulnerability:

  • @hedning
  • @lovek323
  • @jtojnar
  • @7c6f434c
  • @dasj19
  • @bobby285271

Conclusion

In conclusion, the libsoup vulnerability can lead to a denial of service (DoS) attack on WebSocket servers, which can cause significant impact on the availability of the server and the services it provides. It is essential that affected package maintainers update their packages to the latest version and that users ensure their systems are up-to-date. By taking these steps, we can mitigate the vulnerability and prevent potential attacks.

References

Introduction

In our previous article, we discussed the libsoup vulnerability that can lead to a denial of service (DoS) attack on WebSocket servers. In this article, we will answer some frequently asked questions (FAQs) related to the vulnerability.

Q: What is the libsoup vulnerability?

A: The libsoup vulnerability is a flaw in the SoupWebsocketConnection that can cause it to accept a large WebSocket message, leading to a denial of service (DoS) attack.

Q: What is the impact of the vulnerability?

A: The vulnerability can lead to a denial of service (DoS) attack on WebSocket servers, causing the server to allocate a large amount of memory and become unresponsive.

Q: Which packages are affected by the vulnerability?

A: The following packages are affected by the vulnerability:

  • libsoup (2.74.3@nixos-24.11)
  • libsoup_3 (3.6.1@nixos-24.11, 3.6.4@nixos-unstable)
  • libsoup_2_4 (2.74.3@nixos-unstable)
  • gnome2.libsoup (2.74.3@nixos-24.11)
  • tests.pkg-config.defaultPkgConfigPackages."libsoup-gnome-2.4" (2.4@nixos-24.11)

Q: What is the CVSS score for the vulnerability?

A: The CVSS score for the vulnerability is 3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Q: What are the affected package maintainers?

A: The following package maintainers are affected by this vulnerability:

  • @hedning
  • @lovek323
  • @jtojnar
  • @7c6f434c
  • @dasj19
  • @bobby285271

Q: How can I mitigate the vulnerability?

A: To mitigate the vulnerability, it is recommended that affected package maintainers update their packages to the latest version. Additionally, users should ensure that their systems are up-to-date and that any affected packages are updated promptly.

Q: What are the consequences of not updating the affected packages?

A: If the affected packages are not updated, the vulnerability can lead to a denial of service (DoS) attack on WebSocket servers, causing the server to allocate a large amount of memory and become unresponsive.

Q: Can I prevent the vulnerability from occurring?

A: Yes, you can prevent the vulnerability from occurring by updating the affected packages to the latest version and ensuring that your system is up-to-date.

Q: What should I do if I have already been affected by the vulnerability?

A: If you have already been affected by the vulnerability, you should update the affected packages to the latest version and restart your system to ensure that the changes take effect.

Conclusion

In conclusion, the libsoup vulnerability can lead to a denial of service (DoS) attack on WebSocket servers, causing significant impact on the availability of the server and the services it provides. It is essential that affected package maintainers update their packages to the latest version and that users ensure their systems are up-to-date. By taking these steps, we can mitigate the vulnerability and prevent potential attacks.

References