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CVE-2020-26247— XXE in Nokogiri

Quick assessment

Affected
sparklemotion nokogiri
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nokogiri是一款用于解析Ruby中HTML和XML的开源软件库。 Nokogiri 1.11.0.rc4之前版本存在代码问题漏洞，该漏洞允许通过网络访问外部资源，可能会导致XXE或SSRF攻击。

CVSS 2.6 · Low EPSS 1.18% · P67
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I. Basic Information for CVE-2020-26247

Vulnerability Information
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Vulnerability Title
XXE in Nokogiri
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5
Vulnerability Title
Nokogiri 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nokogiri是一款用于解析Ruby中HTML和XML的开源软件库。 Nokogiri 1.11.0.rc4之前版本存在代码问题漏洞，该漏洞允许通过网络访问外部资源，可能会导致XXE或SSRF攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sparklemotion nokogiri < 1.11.0.rc4 -

II. Public POCs for CVE-2020-26247

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III. Intelligence Information for CVE-2020-26247

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Patches & Fixes for CVE-2020-26247 (1)

Vendor Advisories for CVE-2020-26247 (2)

Mailing List Discussions for CVE-2020-26247 (2)

Other References for CVE-2020-26247 (3)

IV. Related Vulnerabilities

Same product: nokogiri
Same vendor: sparklemotion
Same weakness: CWE-611

V. Comments for CVE-2020-26247

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