CVE-2021-31810 Affecting ruby:2.5/rubygems-devel package, versions <0:2.7.6.3-109.module_el8.5.0+259+8cec6917


Severity

Recommended
0.0
medium
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
1% (85th percentile)

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  • Snyk IDSNYK-ALMALINUX8-RUBY-5610222
  • published28 May 2023
  • disclosed5 Aug 2021

Introduced: 5 Aug 2021

CVE-2021-31810  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 ruby:2.5/rubygems-devel to version 0:2.7.6.3-109.module_el8.5.0+259+8cec6917 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/rubygems-devel package and not the ruby:2.5/rubygems-devel 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 Scores

version 3.1