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CVE-2020-25739

Published: 23 September 2020

An issue was discovered in the gon gem before gon-6.4.0 for Ruby. MultiJson does not honor the escape_mode parameter to escape fields as an XSS protection mechanism. To mitigate, json_dumper.rb in gon now does escaping for XSS by default without relying on MultiJson.

From the Ubuntu Security Team

It was discovered that Gon gem did not properly escape certain input. An attacker could use this vulnerability to execute a cross-site scripting (XSS) attack.

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
ruby-gon
Launchpad, Ubuntu, Debian
hirsute Not vulnerable
(6.4.0-1)
bionic
Released (6.1.0-1+deb9u1build0.18.04.1)
focal Needed

groovy Ignored
(end of life)
trusty Does not exist

upstream Needs triage

xenial Needed

jammy Not vulnerable
(6.4.0-1)
impish Not vulnerable
(6.4.0-1)
kinetic Not vulnerable
(6.4.0-1)
lunar Not vulnerable
(6.4.0-1)
mantic Not vulnerable
(6.4.0-1)

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N