Versions of the package sinatra from 0.0.0 are vulnerable to Reliance on Untrusted Inputs in a Security Decision via the X-Forwarded-Host (XFH) header. When making a request to a method with redirect applied, it is possible to trigger an Open Redirect Attack by inserting an arbitrary address into this header. If used for caching purposes, such as with servers like Nginx, or as a reverse proxy, without handling the X-Forwarded-Host header, attackers can potentially exploit Cache Poisoning or Routing-based SSRF.

The remote Fedora 43 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2025-203b7db566 advisory.

    https://fedoraproject.org/wiki/Changes/Ruby_on_Rails_8.0

Tenable has extracted the preceding description block directly from the Fedora 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 Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2024:0276 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2024-21510:
    Versions of the package sinatra from 0.0.0 are vulnerable to Reliance on Untrusted Inputs in a Security     Decision via the X-Forwarded-Host (XFH) header. When making a request to a method with redirect applied,     it is possible to trigger an Open Redirect Attack by inserting an arbitrary address into this header. If     used for caching purposes, such as with servers like Nginx, or as a reverse proxy, without handling the     X-Forwarded-Host header, attackers can potentially exploit Cache Poisoning or Routing-based SSRF.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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 version of pcs installed on the remote host is prior to 0.9.169-3. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2853 advisory.

    Versions of the package sinatra from 0.0.0 are vulnerable to Reliance on Untrusted Inputs in a Security     Decision via the X-Forwarded-Host (XFH) header. When making a request to a method with redirect applied,     it is possible to trigger an Open Redirect Attack by inserting an arbitrary address into this header. If     used for caching purposes, such as with servers like Nginx, or as a reverse proxy, without handling the     X-Forwarded-Host header, attackers can potentially exploit Cache Poisoning or Routing-based SSRF.
    (CVE-2024-21510)

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

  - Versions of the package sinatra from 0.0.0 are vulnerable to Reliance on Untrusted Inputs in a Security     Decision via the X-Forwarded-Host (XFH) header. When making a request to a method with redirect applied,     it is possible to trigger an Open Redirect Attack by inserting an arbitrary address into this header. If     used for caching purposes, such as with servers like Nginx, or as a reverse proxy, without handling the     X-Forwarded-Host header, attackers can potentially exploit Cache Poisoning or Routing-based SSRF.
    (CVE-2024-21510)

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

The remote RockyLinux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2024:10987 advisory.

    * sinatra: Open Redirect Vulnerability in Sinatra via X-Forwarded-Host Header (CVE-2024-21510)

Tenable has extracted the preceding description block directly from the RockyLinux 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 Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2024-10987 advisory.

    [0.10.18-2.0.1.el8_10.3]
    - Replace HAM-logo.png with a generic one

    [0.10.18-2.el8_10.3]
    - Prevented any future HTTP header-based attacks on puma/sinatra by removing any headers not recognized by     pcsd       Resolves: RHEL-65595

Tenable has extracted the preceding description block directly from the Oracle 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 Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2024:10987 advisory.

    The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

    Security Fix(es):

    * sinatra: Open Redirect Vulnerability in Sinatra via X-Forwarded-Host Header (CVE-2024-21510)

    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 this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
242193	Fedora 43 : rubygem-actioncable / rubygem-actionmailbox / rubygem-actionmailer / etc (2025-203b7db566)	Nessus	Fedora Local Security Checks	medium
236122	Alibaba Cloud Linux 3 : 0276: pcs (ALINUX3-SA-2024:0276)	Nessus	Alibaba Cloud Linux Local Security Checks	medium
235878	Amazon Linux 2 : pcs (ALAS-2025-2853)	Nessus	Amazon Linux Local Security Checks	medium
228236	Linux Distros Unpatched Vulnerability : CVE-2024-21510	Nessus	Misc.	medium
213214	RockyLinux 8 : pcs (RLSA-2024:10987)	Nessus	Rocky Linux Local Security Checks	medium
213038	Oracle Linux 8 : pcs (ELSA-2024-10987)	Nessus	Oracle Linux Local Security Checks	medium
212700	RHEL 8 : pcs (RHSA-2024:10987)	Nessus	Red Hat Local Security Checks	medium

Detections

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CVE-2024-21510

medium

Tenable Plugins

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