Vulnerability Report

CVE-2020-26247

Title: XXE vulnerability in Nokogiri Rubygem

XXE

Proof Of Concept

No public PoC currently indexed for CVE-2020-26247.

CWE Category CWE-611
Published Date Dec 30, 2020
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 2.6 CVSS v3.1
Exploit Probability (EPSS)
0.26%

Vulnerability Summary

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.

Impacted Vendors

N
nokogiri 1

Reference Links

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://lists.debian.org/debian-lts-announce/2021/06/msg00007.html https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html https://rubygems.org/gems/nokogiri https://security.gentoo.org/glsa/202208-29 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://lists.debian.org/debian-lts-announce/2021/06/msg00007.html https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html https://rubygems.org/gems/nokogiri https://security.gentoo.org/glsa/202208-29
CVSS v3.1
Source Entity [email protected]
Severity LOW
2.6
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
4.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
4.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:S/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2020-26247 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N

Affected Stack

No specific products linked.