CVE-2020-25613
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Ruby
PublishedOct 6, 2020
First seenOct 6, 2020
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ruby-lang ruby | v ≤ 2.5.8, 2.6.0 ≤ v ≤ 2.6.6, 2.7.0 ≤ v ≤ 2.7.1 | — |
| ruby-lang webrick | v ≤ 1.6.0 | — |
| fedoraproject fedora | 32, 33 | — |
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