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.
Does this matter?
Lower severity and a low EPSS score (5.45%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.0
- 5.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 5.45% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-113
- Affected
- ruby-lang/ruby · debian/debian linux
- Source
- cve@mitre.org
EPSS 5.5% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
- http://www.securityfocus.com/bid/103684Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1042004
- https://access.redhat.com/errata/RHSA-2018:3729
- https://access.redhat.com/errata/RHSA-2018:3730
- https://access.redhat.com/errata/RHSA-2018:3731
- https://access.redhat.com/errata/RHSA-2019:2028
- https://lists.debian.org/debian-lts-announce/2018/04/msg00023.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/04/msg00024.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
- https://lists.debian.org/debian-lts-announce/2019/12/msg00009.html
- https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html
- https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
- https://usn.ubuntu.com/3685-1/
- https://www.debian.org/security/2018/dsa-4259
- https://www.ruby-lang.org/en/news/2018/03/28/http-response-splitting-in-webrick-cve-2017-17742/Vendor Advisory
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/Patch, Release Notes
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/Patch, Release Notes
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/Patch, Release Notes
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/Patch, Release Notes
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
- http://www.securityfocus.com/bid/103684Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1042004
- https://access.redhat.com/errata/RHSA-2018:3729
- https://access.redhat.com/errata/RHSA-2018:3730
- https://access.redhat.com/errata/RHSA-2018:3731
- https://access.redhat.com/errata/RHSA-2019:2028
- https://lists.debian.org/debian-lts-announce/2018/04/msg00023.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/04/msg00024.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.