CVE-2020-25613
HIGH 7.5EPSS 3.8%
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 v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS v2.0 NVD
- 5.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N - EPSS
- 3.82% chance of exploitation in the next 30 days, 90th percentile
- Published
- 2020-10-06
- Updated
- 2024-08-04
Proof-of-concept exploits (1)
- metapox/CVE-2020-256130★ · 2022-03-30
Security advisories
- https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613
- ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7
- https://hackerone.com/reports/965267
- https://security.netapp.com/advisory/ntap-20210115-0008
- advisories/GHSA-gwfg-cqmg-cf8f