vulnerability

Alma Linux: CVE-2021-31810: Important: ruby:2.7 security update (Multiple Advisories)

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
Jul 13, 2021
Added
May 4, 2022
Modified
Apr 20, 2026

Description

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).

Solutions

alma-upgrade-rubyalma-upgrade-ruby-default-gemsalma-upgrade-ruby-develalma-upgrade-ruby-docalma-upgrade-ruby-irbalma-upgrade-ruby-libsalma-upgrade-rubygem-abrtalma-upgrade-rubygem-abrt-docalma-upgrade-rubygem-bigdecimalalma-upgrade-rubygem-bsonalma-upgrade-rubygem-bson-docalma-upgrade-rubygem-bundleralma-upgrade-rubygem-bundler-docalma-upgrade-rubygem-did_you_meanalma-upgrade-rubygem-io-consolealma-upgrade-rubygem-irbalma-upgrade-rubygem-jsonalma-upgrade-rubygem-minitestalma-upgrade-rubygem-mongoalma-upgrade-rubygem-mongo-docalma-upgrade-rubygem-mysql2alma-upgrade-rubygem-mysql2-docalma-upgrade-rubygem-net-telnetalma-upgrade-rubygem-opensslalma-upgrade-rubygem-pgalma-upgrade-rubygem-pg-docalma-upgrade-rubygem-power_assertalma-upgrade-rubygem-psychalma-upgrade-rubygem-rakealma-upgrade-rubygem-rdocalma-upgrade-rubygem-test-unitalma-upgrade-rubygem-xmlrpcalma-upgrade-rubygemsalma-upgrade-rubygems-devel
Title
Rapid7 Labs

2026 Global Threat Landscape Report

The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.