Information Exposure Affecting ruby package, versions [,2.6.8)[2.7.0,2.7.4)[3.0.0,3.0.2)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.29% (69th percentile)

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  • Snyk IDSNYK-UNMANAGED-RUBY-2370175
  • published26 Jan 2022
  • disclosed13 Jul 2021
  • creditUnknown

Introduced: 13 Jul 2021

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

How to fix?

Upgrade ruby to version 2.6.8, 2.7.4, 3.0.2 or higher.

Overview

Affected versions of this package are vulnerable to Information Exposure. 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).

References

CVSS Scores

version 3.1