CVE-2018-16396
An issue was discovered in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.97%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. It does not taint strings that result from unpacking tainted strings with some formats.
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.97% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- ruby-lang/ruby · canonical/ubuntu linux · debian/debian linux · redhat/enterprise linux
- Source
- cve@mitre.org
EPSS 8.0% 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.securitytracker.com/id/1042106Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3729Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3730Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3731Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2028
- https://hackerone.com/reports/385070Permissions Required, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00020.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20190221-0002/Third Party Advisory
- https://usn.ubuntu.com/3808-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4332Third Party Advisory
- https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396/Vendor Advisory
- https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/Release Notes
- https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released/Release Notes
- https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released/Release Notes
- https://www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released/Release Notes
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
- http://www.securitytracker.com/id/1042106Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3729Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3730Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3731Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2028
- https://hackerone.com/reports/385070Permissions Required, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00020.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20190221-0002/Third Party Advisory
- https://usn.ubuntu.com/3808-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4332Third Party Advisory
- https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396/Vendor Advisory
- https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/Release Notes
- https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released/Release Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.