CVE-2017-17742
ruby: HTTP response splitting in WEBrick
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · March 28, 2018
Updated · November 2, 2026
Description
It was found that WEBrick did not sanitize headers sent back to clients, resulting in a response-splitting vulnerability. An attacker, able to control the server's headers, could force WEBrick into injecting additional headers to a client.
Statement
This issue affects the versions of ruby as shipped with Red Hat CloudForms 4. Red Hat Product Security has rated this issue as having security impact of Moderate. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
This issue affects the versions of ruby as shipped with Red Hat Subscription Asset Manager 1. Red Hat Product Security has rated this issue as having security impact of Moderate. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
The server can manually sanitize possibly untrusted headers prior to inserting them in the reply.
CVSS / CWE
CVSS 3.0 · 4.7CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
CWE-113 · Improper Neutralization of CRLF Sequences in HTTP Headers