リモートの Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS ホストには、USN-7840-1 のアドバイザリに記載されている複数の脆弱性の影響を受けるパッケージがインストールされています。

    Ruby にバンドルされている REXML モジュールが、特定の文字のインスタンスが繰り返される XML ドキュメントの解析を不適切に処理することが判明しました。攻撃者がこの問題を利用して、REXMLに過剰なリソースを消費させ、サービス拒否を引き起こす可能性があります。Ubuntu 18.04 LTS と Ubuntu 20.04 LTS は USN-7256-1 と USN-7734-1で以前は対処されています。この更新は、Ubuntu 16.04 LTS の問題に対処します。
    (CVE-2024-35176)

    Ruby にバンドルされている REXML モジュールが、特定の文字のインスタンスが繰り返される XML ドキュメントの解析を不適切に処理することが判明しました。攻撃者がこの問題を利用して、REXMLに過剰なリソースを消費させ、サービス拒否を引き起こす可能性があります。Ubuntu 20.04 LTS は USN-7256-1で以前に対処されています。この更新プログラムは、Ubuntu 16.04 LTSおよびUbuntu 18.04 LTSの問題に対処します。CVE-2024-39908、 CVE-2024-41123

    Ruby にバンドルされている REXML モジュールが、多くのエンティティ拡張のある XML ドキュメントの解析を不適切に処理していることが判明しました。攻撃者がこの問題を利用して、REXMLに過剰なリソースを消費させ、サービス拒否を引き起こす可能性があります。Ubuntu 20.04 LTS は USN-7091-2で以前に対処されています。この更新プログラムは、Ubuntu 16.04 LTSおよびUbuntu 18.04 LTSの問題に対処します。CVE-2024-41946

    RubyにバンドルされているWEBrickモジュールが、Content-LengthヘッダーとTransfer-Encodingヘッダーの両方があるものを不適切に処理していることがわかりました。リモートの攻撃者がこの問題を利用して、HTTP リクエストスマグリング攻撃を実行する可能性があります。(CVE-2024-47220)

    RubyにバンドルされているWEBrickモジュールが、HTTPヘッダーを不適切に解析していることがわかりました。WEBrickモジュールがHTTPプロキシの後方に配置される構成では、リモートの攻撃者がこの問題を悪用して、HTTPリクエストスマグリング攻撃を仕掛ける可能性があります。CVE-2025-6442

Tenable は、前述の説明ブロックを Ubuntu セキュリティアドバイザリから既に直接抽出しています。

Nessus はこれらの問題をテストしておらず、代わりにアプリケーションが自己報告するバージョン番号にのみ依存していることに注意してください。

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2024:6785 advisory.

    * rexml: DoS vulnerability in REXML (CVE-2024-39908)
    * rexml: rubygem-rexml: DoS when parsing an XML having many specific characters such as whitespace     character, >] and ]> (CVE-2024-41123)
    * rexml: DoS vulnerability in REXML (CVE-2024-41946)
    * rexml: DoS vulnerability in REXML (CVE-2024-43398)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:3874-1 advisory.

    - CVE-2024-43398: Fixed DoS when parsing a XML that has many deep elements with the same local name     attributes (bsc#1229673)
    - CVE-2024-41123: Fixed DoS when parsing an XML that contains many specific characters such as     whitespaces, >] and ]> (bsc#1228794)
    - CVE-2024-41946: Fixed DoS when parsing an XML that has many entity expansions with SAX2 or pull parser     API (bsc#1228799)
    - CVE-2024-35176: Fixed DoS when parsing an XML that has many left angled brackets in an attribute value     (bsc#1224390)
    - CVE-2024-39908: Fixed ReDos when parsing an XML that has many specific characters (bsc#1228072)

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.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-921 advisory.

    REXML is an XML toolkit for Ruby. The REXML gem before 3.2.6 has a denial of service vulnerability when it     parses an XML that has many <s in an attribute value. Those who need to parse untrusted XMLs may be     impacted to this vulnerability. The REXML gem 3.2.7 or later include the patch to fix this vulnerability.
    As a workaround, don't parse untrusted XMLs. (CVE-2024-35176)

    REXML is an XML toolkit for Ruby. The REXML gem before 3.3.1 has some DoS vulnerabilities when it parses     an XML that has many specific characters such as `<`, `0` and `%>`. If you need to parse untrusted XMLs,     you many be impacted to these vulnerabilities. The REXML gem 3.3.2 or later include the patches to fix     these vulnerabilities. Users are advised to upgrade. Users unable to upgrade should avoid parsing     untrusted XML strings. (CVE-2024-39908)

    REXML is an XML toolkit for Ruby. The REXML gem before 3.3.2 has some DoS vulnerabilities when it parses     an XML that has many specific characters such as whitespace character, `>]` and `]>`. The REXML gem 3.3.3     or later include the patches to fix these vulnerabilities. (CVE-2024-41123)

    REXML is an XML toolkit for Ruby. The REXML gem 3.3.2 has a DoS vulnerability when it parses an XML that     has many entity expansions with SAX2 or pull parser API. The REXML gem 3.3.3 or later include the patch to     fix the vulnerability. (CVE-2024-41946)

    REXML is an XML toolkit for Ruby. The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML     that has many deep elements that have same local name attributes. If you need to parse untrusted XMLs with     tree parser API like REXML::Document.new, you may be impacted to this vulnerability. If you use other     parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected. The REXML     gem 3.3.6 or later include the patch to fix the vulnerability. (CVE-2024-43398)

Tenable has extracted the preceding description block directly from the tested product 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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-6784 advisory.

    - Fix DoS vulnerability in rexml.
      (CVE-2024-39908)       (CVE-2024-41946)       (CVE-2024-43398)       Resolves: RHEL-57049       Resolves: RHEL-57054       Resolves: RHEL-57069
    - Fix REXML DoS when parsing an XML having many specific characters such as       whitespace character, >] and ]>.
      (CVE-2024-41123)       Resolves: RHEL-52783

    rubygem-abrt

Tenable has extracted the preceding description block directly from the Oracle Linux 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 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.

The remote openSUSE 15 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2025:0129-1 advisory.

    rubygem-rexml was updated to 3.3.9:

    - fixes CVE-2024-49761, CVE-2024-43398, CVE-2024-41946,       CVE-2024-41123, CVE-2024-39908, CVE-2024-35176
    - bsc#1232440, bsc#1229673, bsc#1228799, bsc#1228794,       bsc#1228072, bsc#1224390

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.

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

  - REXML is an XML toolkit for Ruby. The REXML gem 3.3.2 has a DoS vulnerability when it parses an XML that     has many entity expansions with SAX2 or pull parser API. The REXML gem 3.3.3 or later include the patch to     fix the vulnerability. (CVE-2024-41946)

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

The remote Ubuntu 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7091-2 advisory.

    USN-7091-1 fixed several vulnerabilities in Ruby. This update provides the corresponding update for     ruby2.7 in Ubuntu 20.04 LTS.



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.

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

    REXML is an XML toolkit for Ruby. The REXML gem 3.3.2 has a DoS vulnerability when it parses an XML that     has many entity expansions with SAX2 or pull parser API. The REXML gem 3.3.3 or later include the patch to     fix the vulnerability.(CVE-2024-41946)

     REXML is an XML toolkit for Ruby. The REXML gem before 3.3.1 has some DoS vulnerabilities when it parses     an XML that has many specific characters such as ``, `0` and `%`. If you need to parse untrusted     XMLs, you many be impacted to these vulnerabilities. The REXML gem 3.3.2 or later include the patches to     fix these vulnerabilities. Users are advised to upgrade. Users unable to upgrade should avoid parsing     untrusted XML strings.(CVE-2024-39908)

    REXML is an XML toolkit for Ruby. The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML     that has many deep elements that have same local name attributes. If you need to parse untrusted XMLs with     tree parser API like REXML::Document.new, you may be impacted to this vulnerability. If you use other     parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected. The REXML     gem 3.3.6 or later include the patch to fix the vulnerability.(CVE-2024-43398)

    REXML is an XML toolkit for Ruby. The REXML gem before 3.3.2 has some DoS vulnerabilities when it parses     an XML that has many specific characters such as whitespace character, `]` and `]`. The REXML gem     3.3.3 or later include the patches to fix these vulnerabilities.(CVE-2024-41123)

Tenable has extracted the preceding description block directly from the EulerOS ruby 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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:4063 advisory.

    Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text     files and to perform system management tasks.

    Security Fix(es):

    * rexml: DoS vulnerability in REXML (CVE-2024-39908)

    * rexml: rubygem-rexml: DoS when parsing an XML having many specific characters such as whitespace     character, >] and ]> (CVE-2024-41123)

    * rexml: DoS vulnerability in REXML (CVE-2024-41946)

    * rexml: DoS vulnerability in REXML (CVE-2024-43398)

    * CGI: ReDoS in CGI::Util#escapeElement (CVE-2025-27220)

    * CGI: Denial of Service in CGI::Cookie.parse (CVE-2025-27219)

    * uri: userinfo leakage in URI#join, URI#merge and URI#+ (CVE-2025-27221)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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	Name	Product	Family	Published	Updated	Severity
271850	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTSRuby の脆弱性USN-7840-1	Nessus	Ubuntu Local Security Checks	10/28/2025	10/28/2025	medium
207529	AlmaLinux 9 : ruby:3.3 (ALSA-2024:6785)	Nessus	Alma Linux Local Security Checks	9/20/2024	1/13/2025	high
210110	SUSE SLED15 / SLES15 Security Update : ruby2.5 (SUSE-SU-2024:3874-1)	Nessus	SuSE Local Security Checks	11/2/2024	12/23/2024	high
233684	Amazon Linux 2023 : ruby3.2, ruby3.2-bundled-gems, ruby3.2-default-gems (ALAS2023-2025-921)	Nessus	Amazon Linux Local Security Checks	4/1/2025	10/30/2025	high
207470	Oracle Linux 8 : ruby:3.3 (ELSA-2024-6784)	Nessus	Oracle Linux Local Security Checks	9/19/2024	9/11/2025	high
271850	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Ruby vulnerabilities (USN-7840-1)	Nessus	Ubuntu Local Security Checks	10/28/2025	10/28/2025	medium
234594	openSUSE 15 Security Update : rubygem-rexml (openSUSE-SU-2025:0129-1)	Nessus	SuSE Local Security Checks	4/18/2025	4/18/2025	high
229569	Linux Distros Unpatched Vulnerability : CVE-2024-41946	Nessus	Misc.	3/5/2025	10/28/2025	high
211674	Ubuntu 20.04 LTS : Ruby vulnerabilities (USN-7091-2)	Nessus	Ubuntu Local Security Checks	11/21/2024	12/23/2024	high
212644	EulerOS 2.0 SP11 : ruby (EulerOS-SA-2024-2986)	Nessus	Huawei Local Security Checks	12/12/2024	12/23/2024	high
234769	RHEL 8 : ruby:3.1 (RHSA-2025:4063)	Nessus	Red Hat Local Security Checks	4/23/2025	6/5/2025	high

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