Vulnerability in Ruby-Lang Ruby

CVE-2017-17742

Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1 allows an HTTP Response Splitting attack. An attacker can inject a crafted key and value into an HTTP response for the HTTP server of WEBrick.

EPSS: 0.058 (92.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2017-17742?
CVE-2017-17742 is a medium-severity vulnerability in Ruby-Lang Ruby, classified under HTTP Response Splitting. CVSS score: 5.3/10. Published 2018-04-03.
How severe is CVE-2017-17742?
Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2017-17742 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.