SB2020032004 - Cross-site scripting in ActionView framework for Ruby on Rails

Description

This security bulletin contains information about 1 security vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2020-5267)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the "j" and "escape_javascript" methods . A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install update from vendor's website.

References

• http://www.openwall.com/lists/oss-security/2020/03/19/1
• https://github.com/rails/rails/commit/033a738817abd6e446e1b320cb7d1a5c15224e9a
• https://github.com/rails/rails/security/advisories/GHSA-65cv-r6x7-79hv
• https://lists.debian.org/debian-lts-announce/2020/03/msg00022.html