CVE-2019-16254
Medium
Description
Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 allows HTTP Response Splitting. If a program using WEBrick inserts untrusted input into the response header, an attacker can exploit it to insert a newline character to split a header, and inject malicious content to deceive clients. NOTE: this issue exists because of an incomplete fix for CVE-2017-17742, which addressed the CRLF vector, but did not address an isolated CR or an isolated LF.
SeverityMedium
CVSS5.3
Exploit probability92. percentile4.6%
Product
Ruby
PublishedNov 26, 2019
First seenNov 26, 2019
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ruby-lang ruby | v ≤ 2.3.0, 2.4.0 ≤ v ≤ 2.4.7, 2.5.0 ≤ v ≤ 2.5.6, 2.6.0 ≤ v ≤ 2.6.4 | — |
| debian debian_linux | 8.0 | — |
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