CVE-2021-31810 Affecting ruby:2.5/rubygem-mongo package, versions <0:2.5.1-2.module_el8.5.0+2625+ec418553


Severity

Recommended
0.0
medium
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
3.05% (86th percentile)

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  • Snyk IDSNYK-ALMALINUX8-RUBY-21715476
  • published26 Oct 2026
  • disclosed24 Feb 2022

Introduced: 24 Feb 2022

CVE-2021-31810  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 ruby:2.5/rubygem-mongo to version 0:2.5.1-2.module_el8.5.0+2625+ec418553 or higher.
This issue was patched in ALSA-2022:0672.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby:2.5/rubygem-mongo package and not the ruby:2.5/rubygem-mongo package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port. This potentially makes curl extract information about services that are otherwise private and not disclosed (e.g., the attacker can conduct port scans and service banner extractions).

CVSS Base Scores

version 3.1