Bug 1912487 (CVE-2020-26247) - CVE-2020-26247 rubygem-nokogiri: XML external entity injection via Nokogiri::XML::Schema
Summary: CVE-2020-26247 rubygem-nokogiri: XML external entity injection via Nokogiri::...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-26247
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1912488 1912490 1914234 1914235 1914236 1915396 1915398 1915399
Blocks: 1912492
TreeView+ depends on / blocked
 
Reported: 2021-01-04 15:18 UTC by Pedro Sampaio
Modified: 2021-12-16 18:03 UTC (History)
30 users (show)

Fixed In Version: rubygem-nokogiri 1.11.0.rc4
Clone Of:
Environment:
Last Closed: 2021-10-28 11:00:44 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4702 0 None None None 2021-11-16 14:07:51 UTC
Red Hat Product Errata RHSA-2021:5191 0 None None None 2021-12-16 18:03:09 UTC

Description Pedro Sampaio 2021-01-04 15:18:55 UTC 
In Nokogiri before version 1.11.0.rc4 there is an XXE vulnerability. XML Schemas parsed by Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network, potentially enabling XXE or SSRF attacks.

References:

https://github.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97b
https://github.com/sparklemotion/nokogiri/releases/tag/v1.11.0.rc4
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8q-g5c7-m54m
https://hackerone.com/reports/747489
https://rubygems.org/gems/nokogiri
Comment 1 Pedro Sampaio 2021-01-04 15:19:47 UTC 
Created rubygem-nokogiri tracking bugs for this issue:

Affects: epel-7 [bug 1912490]
Affects: fedora-all [bug 1912488]
Comment 4 Mauro Matteo Cascella 2021-01-11 15:39:39 UTC 
External References:

https://github.com/advisories/GHSA-vr8q-g5c7-m54m
Comment 5 Mauro Matteo Cascella 2021-01-11 16:24:53 UTC 
Mitigation:

There are no known workarounds for affected versions. Please refer to the upstream advisory page for additional information.
Comment 14 errata-xmlrpc 2021-11-16 14:07:50 UTC 
This issue has been addressed in the following products:

  Red Hat Satellite 6.10 for RHEL 7

Via RHSA-2021:4702 https://access.redhat.com/errata/RHSA-2021:4702
Comment 15 errata-xmlrpc 2021-12-16 18:03:07 UTC 
This issue has been addressed in the following products:

  3scale API Management

Via RHSA-2021:5191 https://access.redhat.com/errata/RHSA-2021:5191
Note You need to log in before you can comment on or make changes to this bug.