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Vulnerability record · CVE-2018-8779 · published 3 April 2018

CVE-2018-8779: Ruby-lang ruby improper input validation vulnerability

Ruby Lang · Ruby

In 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, the UNIXServer.open and UNIXSocket.open methods are not checked for null characters. It may be connected to an unintended socket.

7.5 CVSS 3.0 High EPSS 6.9% · top 6.1% CWE-20 · Improper input validation
7.5CVSS 3.0 base score, v2 5.0
6.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
34References
17 Jun 2026Last modified by NVD

Description

In 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, the UNIXServer.open and UNIXSocket.open methods are not checked for null characters. It may be connected to an unintended socket.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
http://www.securityfocus.com/bid/103767 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1042004 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3729 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3730 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3731 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2028
https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html Mailing ListThird Party Advisory
https://usn.ubuntu.com/3626-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4259 Third Party Advisory
https://www.ruby-lang.org/en/news/2018/03/28/poisoned-nul-byte-unixsocket-cve-2018-8779/ Vendor Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/ PatchVendor Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/ PatchVendor Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/ PatchVendor Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/ PatchVendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
http://www.securityfocus.com/bid/103767 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1042004 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3729 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3730 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3731 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2028
https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html Mailing ListThird Party Advisory
https://usn.ubuntu.com/3626-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4259 Third Party Advisory
https://www.ruby-lang.org/en/news/2018/03/28/poisoned-nul-byte-unixsocket-cve-2018-8779/ Vendor Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/ PatchVendor Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/ PatchVendor Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/ PatchVendor Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/ PatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-8779), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.