CVE-2020-25613
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.85%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 3.85% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-444
- Affected
- ruby-lang/ruby · ruby-lang/webrick · fedoraproject/fedora
- Source
- cve@mitre.org
References
- https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7Patch, Third Party Advisory
- https://hackerone.com/reports/965267Permissions Required, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV/
- https://security.gentoo.org/glsa/202401-27
- https://security.netapp.com/advisory/ntap-20210115-0008/Third Party Advisory
- https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613/Vendor Advisory
- https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7Patch, Third Party Advisory
- https://hackerone.com/reports/965267Permissions Required, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV/
- https://security.gentoo.org/glsa/202401-27
- https://security.netapp.com/advisory/ntap-20210115-0008/Third Party Advisory
- https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.