XXE in Nokogiri
CVE-2020-26247

2.6LOW

Key Information:

Vendor

Sparklemotion

Status
Nokogiri
Vendor
CVE Published:
30 December 2020

What is CVE-2020-26247?

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.

Affected Version(s)

nokogiri < 1.11.0.rc4

References

https://github.com/sparklemotion/nokogiri/security/adviso...
https://rubygems.org/gems/nokogiri
https://hackerone.com/reports/747489

CVSS V3.1

Score:
2.6
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.