Back Linuxsecurity Ubuntu 24.04 LTS Libwebsockets High Denial of Service Risks USN-8024
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in Libwebsockets. Software Description: - libwebsockets: C library for building WebSocket-based network applications Details: Raffaele Bova discovered that Libwebsockets incorrectly handled memory when the upgrade header is not valid in the WebSocket server. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-11677) Raffaele Bova discovered that Libwebsockets did not properly check the size of the destination buffer in the async-dns component. An attacker could possibly use this issue to cause applications to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2025-11678)
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in Libwebsockets. Software Description: - libwebsockets: C library for building WebSocket-based network applications Details: Raffaele Bova discovered that Libwebsockets incorrectly handled memory when the upgrade header is not valid in the WebSocket server. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-11677) Raffaele Bova discovered that Libwebsockets did not properly check the size of the destination buffer in the async-dns component. An attacker could possibly use this issue to cause applications to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2025-11678)
The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS libwebsockets19t64 4.3.3-1.1ubuntu0.1~esm1 Available with Ubuntu Pro Ubuntu 22.04 LTS libwebsockets16 4.0.20-2ubuntu1.1 Ubuntu 20.04 LTS libwebsockets15 3.2.1-3ubuntu0.1~esm1 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.
The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS libwebsockets19t64 4.3.3-1.1ubuntu0.1~esm1 Available with Ubuntu Pro Ubuntu 22.04 LTS libwebsockets16 4.0.20-2ubuntu1.1 Ubuntu 20.04 LTS libwebsockets15 3.2.1-3ubuntu0.1~esm1 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.
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