Vulnerability in Ruby-Lang Ruby
CVE-2020-25613
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.
Vulnerability class: HTTP Request Smuggling
EPSS: 0.038 (89.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Ruby-lang Ruby
- Ruby-lang Webrick
- Fedoraproject Fedora — versions 32, 33
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Permissions Required, Third Party Advisory)
- cve@mitre.org (Vendor Advisory)
- cve@mitre.org (Patch, Third Party Advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (mailing-list)
- cve@mitre.org (vendor-advisory)
Frequently asked questions
- What is CVE-2020-25613?
- CVE-2020-25613 is a high-severity vulnerability in Ruby-Lang Ruby, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.5/10. Published 2020-10-06.
- How severe is CVE-2020-25613?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-25613 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.