The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 host has a package installed that is affected by a vulnerability as referenced in the USN-7709-1 advisory.

    It was discovered that WEBrick incorrectly parsed HTTP headers. In configurations where WEBrick is placed     behind an HTTP proxy, a remote attacker could possibly use this issue to perform an HTTP Request Smuggling     attack.

Tenable has extracted the preceding description block directly from the Ubuntu 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 remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7840-1 advisory.

    It was discovered that the REXML module bunded into Ruby incorrectly handled parsing XML documents with     repeated instances of certain characters. An attacker could possibly use this issue to cause REXML to     consume excessive resources, leading to a denial of service. Ubuntu 18.04 LTS and Ubuntu 20.04 LTS were     previously addressed in USN-7256-1 and USN-7734-1. This update addresses the issue in Ubuntu 16.04 LTS.
    (CVE-2024-35176)

    It was discovered that the REXML module bunded into Ruby incorrectly handled parsing XML documents with     repeated instances of certain characters. An attacker could possibly use this issue to cause REXML to     consume excessive resources, leading to a denial of service. Ubuntu 20.04 LTS was previously addressed in     USN-7256-1. This update addresses the issue in Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2024-39908,     CVE-2024-41123)

    It was discovered that the REXML module bunded into Ruby incorrectly handled parsing XML documents with     many entity expansions. An attacker could possibly use this issue to cause REXML to consume excessive     resources, leading to a denial of service. Ubuntu 20.04 LTS was previously addressed in USN-7091-2. This     update addresses the issue in Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2024-41946)

    It was discovered that the WEBrick module bundled into Ruby incorrectly handled having both a Content-     Length header and a Transfer-Encoding header. A remote attacker could possibly use this issue to perform a     HTTP request smuggling attack. (CVE-2024-47220)

    It was discovered that the WEBrick module bundled into Ruby incorrectly parsed HTTP headers. In     configurations where the WEBrick module is placed behind an HTTP proxy, a remote attacker could possibly     use this issue to perform an HTTP Request Smuggling attack. (CVE-2025-6442)

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.

An update of the rubygem package has been released.

According to the versions of the ruby packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers     to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable     when the product is deployed behind an HTTP proxy that fulfills specific conditions.

    The specific flaw exists within the read_headers method. The issue results from the inconsistent parsing     of terminators of HTTP headers. An attacker can leverage this vulnerability to smuggle arbitrary HTTP     requests. Was ZDI-CAN-21876.(CVE-2025-6442)

Tenable has extracted the preceding description block directly from the EulerOS ruby 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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-984790 advisory.

    Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers     to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable     when the product is deployed behind an HTTP proxy that fulfills specific conditions.

    The specific flaw exists within the read_headers method. The issue results from the inconsistent parsing     of terminators of HTTP headers. An attacker can leverage this vulnerability to smuggle arbitrary HTTP     requests. Was ZDI-CAN-21876.

Tenable has extracted the preceding description block directly from the Unity Linux 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 remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:4264-1 advisory.

    - CVE-2024-35221: Fixed remote DoS via YAML manifest (bsc#1225905)
    - CVE-2024-47220: Fixed HTTP request smuggling in WEBrick (bsc#1230930)
    - CVE-2024-49761: Fixed ReDOS vulnerability by updating REXML to 3.3.9 (bsc#1232440)
    - CVE-2025-24294: Fixed denial of service (DoS) caused by an insufficient check on the length       of a decompressed domain name within a DNS packet in resolv gem (bsc#1246430)
    - CVE-2025-27219: Fixed denial of service in CGI::Cookie.parse (bsc#1237804)
    - CVE-2025-27220: Fixed ReDoS in CGI::Util#escapeElement (bsc#1237806)
    - CVE-2025-27221: Fixed userinfo leakage in URI#join, URI#merge and URI#+ (bsc#1237805)
    - CVE-2025-6442: Fixed ruby WEBrick read_header HTTP request smuggling vulnerability (bsc#1245254)

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

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
253653	Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : WEBrick vulnerability (USN-7709-1)	Nessus	Ubuntu Local Security Checks	2025/8/22	2025/8/22	medium
271850	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Ruby vulnerabilities (USN-7840-1)	Nessus	Ubuntu Local Security Checks	2025/10/28	2025/10/28	medium
264552	Photon OS 5.0: Rubygem PHSA-2025-5.0-0615	Nessus	PhotonOS Local Security Checks	2025/9/11	2025/9/11	medium
274957	EulerOS 2.0 SP10 : ruby (EulerOS-SA-2025-2428)	Nessus	Huawei Local Security Checks	2025/11/12	2025/11/12	medium
267404	Unity Linux 20.1070e Security Update: rubygem-webrick (UTSA-2025-984790)	Nessus	Unity Linux Local Security Checks	2025/10/7	2025/10/10	medium
277246	SUSE SLED15: libruby2_5-2_5 / ruby2.5 / ruby2.5-devel / ruby2.5-devel-extra / etc (SUSE-SU-2025:4264-1)	Nessus	SuSE Local Security Checks	2025/12/3	2026/6/26	high

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