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active-support impersonates 'activesupport' gem

Critical severity GitHub Reviewed Published Aug 13, 2018 to the GitHub Advisory Database • Updated Jan 18, 2023

Package

bundler active-support (RubyGems)

Affected versions

> 0

Patched versions

None

Description

The active-support ruby gem gem is malware and duplicates the official activesupport (no hyphen) gem, but adds a compiled extension. The extension attempts to resolve a base64 encoded domain (29faea63.planfhntage.de), downloads a payload, and executes.

This trojan horse gem could allow a remote attacker to execute arbitrary code on the system, caused by containing a malicious backdoor. An attacker could exploit this vulnerability to execute arbitrary code on the system. No version of this gem should be considered safe.

References

Published to the GitHub Advisory Database Aug 13, 2018
Reviewed Jun 16, 2020
Last updated Jan 18, 2023

Severity

Critical

EPSS score

1.000%
(84th percentile)

Weaknesses

CVE ID

CVE-2018-3779

GHSA ID

GHSA-2j55-pcw5-x4h2

Source code

No known source code
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