CVE-2020-26247 Information

Description

Nokogiri is a Rubygem providing HTML XML SAX and Reader parsers with XPath and CSS selector support. 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. This behavior is counter to the security policy followed by Nokogiri maintainers which is to treat all input as untrusted by default whenever possible. This is fixed in Nokogiri version 1.11.0.rc4.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Reference

https://rubygems.org/gems/nokogiri https://github.com/sparklemotion/nokogiri/releases/tag/v1.11.0.rc4 https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8q-g5c7-m54m https://github.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97b https://hackerone.com/reports/747489 https://lists.debian.org/debian-lts-announce/2021/06/msg00007.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

4.3