A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails < 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016644 advisory.

    A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails <     6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified     by an end user bypassing upload limits.

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

  - A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails <     6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified     by an end user bypassing upload limits. (CVE-2020-8162)

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails <
    6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified
    by an end user bypassing upload limits. (CVE-2020-8162)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:1313 advisory.

    Red Hat Satellite is a systems management tool for Linux-based     infrastructure. It allows for provisioning, remote management, and     monitoring of multiple Linux deployments with a single centralized tool.

    Security Fix(es):

    * foreman: Managing repositories with their id via hammer does not respect the role filters     (CVE-2017-2662)
    * python-psutil: Double free because of refcount mishandling (CVE-2019-18874)
    * candlepin: netty: compression/decompression codecs don't enforce limits on buffer allocation sizes     (CVE-2020-11612)
    * foreman: world-readable OMAPI secret through the ISC DHCP server (CVE-2020-14335)
    * candlepin: resteasy-client: potential sensitive information leakage in JAX-RS RESTEasy Client's     WebApplicationException handling (CVE-2020-25633)
    * python-django: potential SQL injection via tolerance parameter in GIS functions and aggregates on     Oracle (CVE-2020-9402)

    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.

    Additional Changes:

    * Usability enhancements to Red Hat's Simple Content Access mode and Satellite

    * Usability improvements to enabling Remote Execution on your hosts.

    * Notifications in the UI to warn users when subscriptions are expiring.

    * Usability enhancements to enable Insights integration with Satellite.

    * Performance improvements to various aspects of the user interface and API.

    * Added support for OpenID Connect for authentication.

    * Usability improvements to the Satellite Installer.

    * Updated Ruby web server to the modern Puma application server which replaces Passenger.

    The items above are not a complete list of changes. This update also fixes     several bugs and adds various enhancements. Documentation for these changes     is available from the Release Notes document linked to 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.

Multiple security issues were discovered in the Rails web framework which could result in cross-site scripting, information leaks, code execution, cross-site request forgery or bypass of upload limits.

Ruby on Rails blog :

Hi everyone! Rails 5.2.4.3 and 6.0.3.1 have been released! These releases contain important security fixes, so please upgrade when you can.

Both releases contain the following fixes :

CVE-2020-8162: Circumvention of file size limits in ActiveStorage

CVE-2020-8164: Possible Strong Parameters Bypass in ActionPack

CVE-2020-8165: Potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore

CVE-2020-8166: Ability to forge per-form CSRF tokens given a global CSRF token

CVE-2020-8167: CSRF Vulnerability in rails-ujs

ID	Name	Product	Family	Type	Severity
316312	Unity Linux 20.1060e / 20.1070e Security Update: rubygem-rails (UTSA-2026-016644)	Nessus	Unity Linux Local Security Checks	Local	high
258196	Linux Distros Unpatched Vulnerability : CVE-2020-8162	Nessus	Misc.	Local	high
422696	SCA: security update for activestorage (GHSA-m42x-37p3-fv5w)	Tenable Cloud Security	SCA Checks	Local	high
422696	SCA: security update for activestorage (GHSA-m42x-37p3-fv5w)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
148903	RHEL 7 : Satellite 6.9 Release (Moderate) (RHSA-2021:1313)	Nessus	Red Hat Local Security Checks	Local	critical
140796	Debian DSA-4766-1 : rails - security update	Nessus	Debian Local Security Checks	Local	critical
136726	FreeBSD : Rails -- multiple vulnerabilities (85fca718-99f6-11ea-bf1d-08002728f74c)	Nessus	FreeBSD Local Security Checks	Local	critical

Detections

Analytics

CVE-2020-8162

high

Tenable Plugins

high

high

high

high

critical

critical

critical