CVE-2020-26247
XXE in Nokogiri
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Nokogiri es un Rubygem que proporciona analizadores de HTML, XML, SAX y Reader con compatibilidad con el selector XPath y CSS. En Nokogiri versiones anteriores a 1.11.0.rc4, se presenta una vulnerabilidad de tipo XXE. Los esquemas XML analizados por la función Nokogiri::XML::Schema son confiables por defecto, permitiendo acceder a recursos externos por medio de la red, potencialmente permitiendo ataques de tipo XXE o SSRF. Este comportamiento es contrario a la política de seguridad seguida por los mantenedores de Nokogiri, que consiste en tratar todas las entradas como no confiables por defecto siempre que sea posible. Esto es corregido en Nokogiri versión 1.11.0.rc4.
A flaw was found in Nokogiri. XML Schemas parsed by Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network, potentially enabling XML External Entity (XXE) or Server-side request forgery (SSRF) attacks. The highest threat from this vulnerability is to data confidentiality.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2020-10-01 CVE Reserved
- 2020-12-30 CVE Published
- 2023-03-07 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-611: Improper Restriction of XML External Entity Reference
CAPEC
References (9)
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97b | 2022-10-19 |
| URL | Date | SRC |
|---|---|---|
| https://security.gentoo.org/glsa/202208-29 | 2022-10-19 | |
| https://access.redhat.com/security/cve/CVE-2020-26247 | 2021-12-16 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1912487 | 2021-12-16 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Nokogiri Search vendor "Nokogiri" | Nokogiri Search vendor "Nokogiri" for product "Nokogiri" | < 1.11.0 Search vendor "Nokogiri" for product "Nokogiri" and version " < 1.11.0" | ruby |
Affected
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| Nokogiri Search vendor "Nokogiri" | Nokogiri Search vendor "Nokogiri" for product "Nokogiri" | 1.11.0 Search vendor "Nokogiri" for product "Nokogiri" and version "1.11.0" | rc1, ruby |
Affected
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| Nokogiri Search vendor "Nokogiri" | Nokogiri Search vendor "Nokogiri" for product "Nokogiri" | 1.11.0 Search vendor "Nokogiri" for product "Nokogiri" and version "1.11.0" | rc2, ruby |
Affected
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| Nokogiri Search vendor "Nokogiri" | Nokogiri Search vendor "Nokogiri" for product "Nokogiri" | 1.11.0 Search vendor "Nokogiri" for product "Nokogiri" and version "1.11.0" | rc3, ruby |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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