GHSA-2j55-pcw5-x4h2

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GHSA-2j55-pcw5-x4h2

Summary: active-support impersonates 'activesupport' gem

Details: 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: https://nvd.nist.gov/vuln/detail/CVE-2018-3779, https://hackerone.com/reports/392311, https://github.com/advisories/GHSA-2j55-pcw5-x4h2