PT-2020-16179 · Ruby+1 · Gon+1

Published 2020-09-23 · Updated 2023-01-31 · CVE-2020-25739

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions gon versions prior to 6.4.0

Description An issue was discovered in the gon gem for Ruby, where 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.

Recommendations For versions prior to 6.4.0, update to version 6.4.0 or later to ensure that json dumper.rb in gon escapes fields for XSS protection by default.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2020-25739

DLA-2380-1

GHSA-78VQ-9J56-WRFR

USN-4560-1

Affected Products

Ubuntu

Gon

References · 17

• 🔥 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/gon/CVE-2020-25739.yml · Exploit
• https://github.com/gazay/gon/commit/fe3c7b2191a992386dc9edd37de5447a4e809bc7 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2020-25739 · Security Note
• https://usn.ubuntu.com/4560-1 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2380-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-25739 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-25739 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-78vq-9j56-wrfr · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4560-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4560-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-25739 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-25739 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-25739 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-25739 · Vendor Advisory
• https://github.com/gazay/gon · Note