GHSA-78vq-9j56-wrfr

Gon gem lack of escaping certain input when outputting as JSON

Source: GitHub Advisory Database (reviewed) Moderate CVE-2020-25739

Packages

Ecosystem	Package	Affected	Fixed in
RubyGems	gon	< 6.4.0	6.4.0

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2020-25739 advisory
https://github.com/gazay/gon/commit/fe3c7b2191a992386dc9edd37de5447a4e809bc7 web
https://github.com/gazay/gon package
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/gon/CVE-2020-25739.yml web
https://lists.debian.org/debian-lts-announce/2020/09/msg00018.html web
https://usn.ubuntu.com/4560-1 web