Detections
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SCA: security update for unpoly-rails (GHSA-m875-3xf6-mf78)
high Tenable Self-Hosted Container Security Plugin ID 416831
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Unpoly is a JavaScript framework for server-side web applications. There is a possible Denial of Service
(DoS) vulnerability in the `unpoly-rails` gem that implements the Unpoly server protocol for Rails
applications. This issues affects Rails applications that operate as an upstream of a load balancer's that
uses passive health checks. The `unpoly-rails` gem echoes the request URL as an `X-Up-Location` response
header. By making a request with exceedingly long URLs (paths or query string), an attacker can cause
unpoly-rails to write a exceedingly large response header. If the response header is too large to be
parsed by a load balancer downstream of the Rails application, it may cause the load balancer to remove
the upstream from a load balancing group. This causes that application instance to become unavailable
until a configured timeout is reached or until an active healthcheck succeeds. This issue has been fixed
and released as version 2.7.2.2 which is available via RubyGems and GitHub. Users unable to upgrade may:
Configure your load balancer to use active health checks, e.g. by periodically requesting a route with a
known response that indicates healthiness; Configure your load balancer so the maximum size of response
headers is at least twice the maximum size of a URL; or instead of changing your server configuration you
may also configure your Rails application to delete redundant `X-Up-Location` headers set by unpoly-rails.
(CVE-2023-28846)
See Also
Plugin Details
Severity: High
ID: 416831
Version: Revision 1.11
Type: Local
Family: SCA Checks
Published: 1/23/2025
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.51
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2023-28846
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 3/30/2023
Vulnerability Publication Date: 3/30/2023
Reference Information
CVE: CVE-2023-28846
cwe: CWE-400