CVE-2020-25739: XSS
First published: Wed Sep 23 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| rubygems/gon | <6.4.0 | 6.4.0 |
| debian/ruby-gon | 6.4.0-1 6.4.0-2 | |
| ubuntu/ruby-gon | <6.1.0-1+ | 6.1.0-1+ |
| gon project gon Ruby | <6.4.0 | |
| Ubuntu Linux | =18.04 | |
| Debian GNU/Linux | =9.0 | |
| Gon Project Gon | <6.4.0 | |
| Ubuntu | =18.04 | |
| Debian | =9.0 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2020-25739
- https://github.com/gazay/gon/commit/fe3c7b2191a992386dc9edd37de5447a4e809bc7
- https://lists.debian.org/debian-lts-announce/2020/09/msg00018.html
- https://usn.ubuntu.com/4560-1/
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/gon/CVE-2020-25739.yml
- https://github.com/advisories/GHSA-78vq-9j56-wrfr (Advisory)
- https://launchpad.net/bugs/cve/CVE-2020-25739
- https://security-tracker.debian.org/tracker/CVE-2020-25739
- https://ubuntu.com/security/notices/USN-4560-1
- https://www.cve.org/CVERecord?id=CVE-2020-25739
- https://ubuntu.com/security/CVE-2020-25739
Frequently Asked Questions
What is the severity of CVE-2020-25739?
CVE-2020-25739 is classified as a medium severity vulnerability due to its potential for XSS attacks.
How do I fix CVE-2020-25739?
To fix CVE-2020-25739, upgrade the gon gem to version 6.4.0 or later.
Which versions of the gon gem are affected by CVE-2020-25739?
Versions of the gon gem prior to 6.4.0 are affected by CVE-2020-25739.
Is CVE-2020-25739 applicable to Debian packages?
Yes, versions of ruby-gon prior to 6.4.0-1 and 6.4.0-2 are vulnerable to CVE-2020-25739.
What types of systems are affected by CVE-2020-25739?
CVE-2020-25739 affects systems using the gon gem in Ruby applications, including Debian and Ubuntu installations.
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