Exposure of Resource to Wrong Sphere Affecting jruby package, versions <9.3.9.0+ds-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.29% (69th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-JRUBY-1533599
  • published8 Jul 2021
  • disclosed13 Jul 2021

Introduced: 8 Jul 2021

CVE-2021-31810  (opens in a new tab)
CWE-668  (opens in a new tab)

How to fix?

Upgrade Debian:unstable jruby to version 9.3.9.0+ds-1 or higher.

NVD Description

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