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CVE-2020-25613

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Date: October 5, 2020

An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack.

Language: Ruby

Severity Score

Related Resources (24)

https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7
https://access.redhat.com/security/cve/CVE-2020-25613
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ/
https://github.com/ruby/webrick/commit/af2efdcdf826f25592202d187c53963e7932e4b9
https://github.com/ruby/webrick/commit/7618049fa57ddad2efff2a7bc7dad7d2d8a311b1
https://nvd.nist.gov/vuln/detail/CVE-2020-25613
https://github.com/ruby/webrick/commit/076ac636bf48b7a492887ce4de7041de23e6c00d
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV
https://github.com/ruby/webrick
https://hackerone.com/reports/965267
https://security.gentoo.org/glsa/202401-27
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV
https://security.netapp.com/advisory/ntap-20210115-0008
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV/
https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
https://security.netapp.com/advisory/ntap-20210115-0008/
https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/webrick/CVE-2020-25613.yml
https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613/
https://security.alpinelinux.org/vuln/CVE-2020-25613
https://security-tracker.debian.org/tracker/CVE-2020-25613
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ
https://www.mend.io/vulnerability-database/CVE-2020-25613

Severity Score

Weakness Type (CWE)

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CWE-444

Top Fix

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Upgrade Version

Upgrade to version webrick - 1.6.1;webrick - 1.5.1;webrick - 1.4.4

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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