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Exposure of Resource to Wrong Sphere Affecting ruby2.7 package, versions <2.7.4-1

0.0
medium

Snyk CVSS

    Attack Complexity Low
    Scope Changed
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NVD
5.8 medium
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Red Hat
5.4 medium
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SUSE
7.5 high

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  • Snyk ID SNYK-DEBIAN11-RUBY27-1316286
  • published 8 Jul 2021
  • disclosed 13 Jul 2021
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Introduced: 8 Jul 2021

CVE-2021-31810 Open this link in a new tab
CWE-668 Open this link in a new tab

How to fix?

Upgrade Debian:11 ruby2.7 to version 2.7.4-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby2.7 package and not the ruby2.7 package as distributed by Debian:11. See How to fix? for Debian:11 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).