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Arbitrary Code Injection Affecting rubygem20-psych package, versions <0:2.0.0-1.31.amzn1

Severity

 Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
2.25% (90th percentile)

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  • Snyk IDSNYK-AMZN201803-RUBYGEM20PSYCH-1711688
  • published27 Sept 2021
  • disclosed20 Dec 2017
Report a new vulnerability Found a mistake?

Introduced: 20 Dec 2017

CVE-2017-17790  (opens in a new tab)
CWE-74  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 rubygem20-psych to version 0:2.0.0-1.31.amzn1 or higher.
This issue was patched in ALAS-2018-983.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rubygem20-psych package and not the rubygem20-psych package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

The lazy_initialize function in lib/resolv.rb in Ruby through 2.4.3 uses Kernel#open, which might allow Command Injection attacks, as demonstrated by a Resolv::Hosts::new argument beginning with a '|' character, a different vulnerability than CVE-2017-17405. NOTE: situations with untrusted input may be highly unlikely.