The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient check on the length of a decompressed domain name within a DNS packet. An attacker can craft a malicious DNS packet containing a highly compressed domain name. When the resolv library parses such a packet, the name decompression process consumes a large amount of CPU resources, as the library does not limit the resulting length of the name. This resource consumption can cause the application thread to become unresponsive, resulting in a Denial of Service condition.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7734-1 advisory.

    It was discovered that Ruby incorrectly handled certain IO stream methods. A remote attacker could use     this issue to cause Ruby to crash, resulting in a denial of service, or possibly obtain sensitive     information. This issue only affected Ubuntu 18.04 LTS. (CVE-2024-27280)

    It was discovered that the Ruby regex compiler incorrectly handled certain memory operations. A remote     attacker could possibly use this issue to obtain sensitive memory contents. This issue only affected     Ubuntu 18.04 LTS. (CVE-2024-27282)

    It was discovered that Ruby incorrectly handled parsing of certain XML characters through the REXML gem.
    An attacker could use this issue to cause Ruby to crash, resulting in a denial of service. This issue only     affected Ubuntu 18.04 LTS. (CVE-2024-35176)

    It was discovered that Ruby incorrectly handled decompressed domain names within a DNS packet. An attacker     could use this issue to cause Ruby to crash, resulting in a denial of service. (CVE-2025-24294)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 25.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7735-1 advisory.

    It was discovered that RubyGems incorrectly handled certain regular expressions. An attacker could use     this issue to cause RubyGems to crash, resulting in a denial of service. This issue only affected Ubuntu     22.04 LTS. (CVE-2023-28755)

    It was discovered that RubyGems incorrectly handled decompressed domain names within a DNS packet. An     attacker could use this issue to cause RubyGems to crash, resulting in a denial of service. This issue     only affected Ubuntu 25.04. (CVE-2025-24294)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient     check on the length of a decompressed domain name within a DNS packet. An attacker can craft a malicious     DNS packet containing a highly compressed domain name. When the resolv library parses such a packet, the     name decompression process consumes a large amount of CPU resources, as the library does not limit the     resulting length of the name. This resource consumption can cause the application thread to become     unresponsive, resulting in a Denial of Service condition. (CVE-2025-24294)

Note that Nessus relies on the presence of the package as reported by the vendor.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2025-1131 advisory.

    The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient     check on the length of a decompressed domain name within a DNS packet.An attacker can craft a malicious     DNS packet containing a highly compressed domain name. When the resolv library parses such a packet, the     name decompression process consumes a large amount of CPU resources, as the library does not limit the     resulting length of the name.This resource consumption can cause the application thread to become     unresponsive, resulting in a Denial of Service condition. (CVE-2025-24294)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of ruby installed on the remote host is prior to 2.0.0.648-36. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2957 advisory.

    The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient     check on the length of a decompressed domain name within a DNS packet.An attacker can craft a malicious     DNS packet containing a highly compressed domain name. When the resolv library parses such a packet, the     name decompression process consumes a large amount of CPU resources, as the library does not limit the     resulting length of the name.This resource consumption can cause the application thread to become     unresponsive, resulting in a Denial of Service condition. (CVE-2025-24294)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the eed1a411-699b-11f0-91fe-000c295725e4 advisory.

    Manu reports:

                The vulnerability is caused by an insufficient check on                 the length of a decompressed domain name within a DNS                 packet.


                An attacker can craft a malicious DNS packet containing a                 highly compressed domain name. When the resolv library                 parses such a packet, the name decompression process                 consumes a large amount of CPU resources, as the library                 does not limit the resulting length of the name.


                This resource consumption can cause the application thread                 to become unresponsive, resulting in a Denial of Service                 condition.


Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
261428	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 : Ruby vulnerabilities (USN-7734-1)	Nessus	Ubuntu Local Security Checks	critical
261426	Ubuntu 22.04 LTS / 25.04 : RubyGems vulnerabilities (USN-7735-1)	Nessus	Ubuntu Local Security Checks	high
246456	Linux Distros Unpatched Vulnerability : CVE-2025-24294	Nessus	Misc.	high
243497	Amazon Linux 2023 : ruby3.2, ruby3.2-bundled-gems, ruby3.2-default-gems (ALAS2023-2025-1131)	Nessus	Amazon Linux Local Security Checks	high
243435	Amazon Linux 2 : ruby (ALAS-2025-2957)	Nessus	Amazon Linux Local Security Checks	high
242862	FreeBSD : rubygem-resolv -- Possible denial of service (eed1a411-699b-11f0-91fe-000c295725e4)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2025-24294

high

Tenable Plugins

critical

high

high

high

high

high