Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ruby-Lang | Ruby | <= 2.5.8 |
| Ruby-Lang | Webrick | <= 1.6.0 |
| Fedoraproject | Fedora | 32 |
Related Weaknesses (CWE)
References
- https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7PatchThird Party Advisory
- https://hackerone.com/reports/965267Permissions RequiredThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- 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-2020-256Vendor Advisory
- https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7PatchThird Party Advisory
- https://hackerone.com/reports/965267Permissions RequiredThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202401-27
- https://security.netapp.com/advisory/ntap-20210115-0008/Third Party Advisory
FAQ
What is CVE-2020-25613?
CVE-2020-25613 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 rigorou...
How severe is CVE-2020-25613?
CVE-2020-25613 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-25613?
Check the references section above for vendor advisories and patch information. Affected products include: Ruby-Lang Ruby, Ruby-Lang Webrick, Fedoraproject Fedora.