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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 9 | ruby2.3 | 2.3.3-1+deb9u4 | DSA-4332-1 |
| Debian 8 | ruby2.1 | 2.1.5-2+deb8u6 | DLA-1558-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | ruby2.5 | 2.5.1-1ubuntu1.1 | USN-3808-1 |
| Ubuntu 16.04 LTS | ruby2.3 | 2.3.1-2~16.04.11 | USN-3808-1 |
| Ubuntu 14.04 LTS | ruby1.9.1 | 1.9.3.484-2ubuntu1.13 | USN-3808-1 |
| Ubuntu 14.04 LTS | ruby2.0 | 2.0.0.484-1ubuntu2.11 | USN-3808-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | ruby +5 | 2.0.0.648-36.el7 | RHSA-2019:2028 |
| RHEL 7 | rubygem-bigdecimal | 1.2.0-36.el7 | RHSA-2019:2028 |
| RHEL 7 | rubygem-io-console | 0.4.2-36.el7 | RHSA-2019:2028 |
| RHEL 7 | rubygem-json | 1.7.7-36.el7 | RHSA-2019:2028 |
| RHEL 7 | rubygem-minitest | 4.3.2-36.el7 | RHSA-2019:2028 |
| RHEL 7 | rubygem-psych | 2.0.0-36.el7 | RHSA-2019:2028 |
| RHEL 7 | rubygem-rake | 0.9.6-36.el7 | RHSA-2019:2028 |
| RHEL 7 | rubygem-rdoc | 4.0.0-36.el7 | RHSA-2019:2028 |
| RHEL 7 | rubygems +1 | 2.0.14.1-36.el7 | RHSA-2019:2028 |
| RHEL 3 | rh-ruby23-ruby +5 | 2.3.8-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-bigdecimal | 1.2.8-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-did_you_mean | 1.0.0-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-io-console | 0.4.5-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-json | 1.8.3.1-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-minitest | 5.8.5-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-net-telnet | 0.1.1-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-power_assert | 0.2.6-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-psych | 2.1.0.1-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-rake | 10.4.2-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-rdoc | 4.2.1-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygem-test-unit | 3.1.5-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby23-rubygems +1 | 2.5.2.3-69.el6 | RHSA-2018:3729 |
| RHEL 3 | rh-ruby24-ruby +4 | 2.4.5-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-bigdecimal | 1.3.2-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-did_you_mean | 1.1.0-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-io-console | 0.4.6-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-json | 2.0.4-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-minitest | 5.10.1-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-net-telnet | 0.1.1-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-openssl | 2.0.9-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-power_assert | 0.4.1-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-psych | 2.2.2-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-rake | 12.0.0-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-rdoc | 5.0.0-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-test-unit | 3.2.3-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygem-xmlrpc | 0.2.1-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby24-rubygems +1 | 2.6.14.3-91.el6 | RHSA-2018:3730 |
| RHEL 3 | rh-ruby25-ruby +4 | 2.5.3-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-bigdecimal | 1.3.4-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-did_you_mean | 1.2.0-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-io-console | 0.4.6-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-json | 2.1.0-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-minitest | 5.10.3-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-net-telnet | 0.1.1-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-openssl | 2.1.2-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-power_assert | 1.1.1-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-psych | 3.0.2-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-rake | 12.3.0-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-rdoc | 6.0.1-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-test-unit | 3.2.7-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygem-xmlrpc | 0.3.0-6.el7 | RHSA-2018:3731 |
| RHEL 3 | rh-ruby25-rubygems +1 | 2.7.6-6.el7 | RHSA-2018:3731 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.6 EUS | ruby +5 | 2.0.0.648-38.el7_6 | RHSA-2020:2839 |
| RHEL 7.6 EUS | rubygem-bigdecimal | 1.2.0-38.el7_6 | RHSA-2020:2839 |
| RHEL 7.6 EUS | rubygem-io-console | 0.4.2-38.el7_6 | RHSA-2020:2839 |
| RHEL 7.6 EUS | rubygem-json | 1.7.7-38.el7_6 | RHSA-2020:2839 |
| RHEL 7.6 EUS | rubygem-minitest | 4.3.2-38.el7_6 | RHSA-2020:2839 |
| RHEL 7.6 EUS | rubygem-psych | 2.0.0-38.el7_6 | RHSA-2020:2839 |
| RHEL 7.6 EUS | rubygem-rake | 0.9.6-38.el7_6 | RHSA-2020:2839 |
| RHEL 7.6 EUS | rubygem-rdoc | 4.0.0-38.el7_6 | RHSA-2020:2839 |
| RHEL 7.6 EUS | rubygems +1 | 2.0.14.1-38.el7_6 | RHSA-2020:2839 |
| RHEL 7.4 TUS | ruby +5 | 2.0.0.648-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 TUS | rubygem-bigdecimal | 1.2.0-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 TUS | rubygem-io-console | 0.4.2-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 TUS | rubygem-json | 1.7.7-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 TUS | rubygem-minitest | 4.3.2-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 TUS | rubygem-psych | 2.0.0-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 TUS | rubygem-rake | 0.9.6-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 TUS | rubygem-rdoc | 4.0.0-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 TUS | rubygems +1 | 2.0.14.1-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 E4S | ruby +5 | 2.0.0.648-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 E4S | rubygem-bigdecimal | 1.2.0-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 E4S | rubygem-io-console | 0.4.2-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 E4S | rubygem-json | 1.7.7-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 E4S | rubygem-minitest | 4.3.2-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 E4S | rubygem-psych | 2.0.0-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 E4S | rubygem-rake | 0.9.6-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 E4S | rubygem-rdoc | 4.0.0-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 E4S | rubygems +1 | 2.0.14.1-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 AUS | ruby +5 | 2.0.0.648-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 AUS | rubygem-bigdecimal | 1.2.0-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 AUS | rubygem-io-console | 0.4.2-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 AUS | rubygem-json | 1.7.7-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 AUS | rubygem-minitest | 4.3.2-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 AUS | rubygem-psych | 2.0.0-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 AUS | rubygem-rake | 0.9.6-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 AUS | rubygem-rdoc | 4.0.0-37.el7_4 | RHSA-2020:2769 |
| RHEL 7.4 AUS | rubygems +1 | 2.0.14.1-37.el7_4 | RHSA-2020:2769 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | ruby2.5 | 2.5.5-4.3.1 | SUSE-SU-2019:1804-1 |
| SLES 15 | ruby2.5 | 2.5.5-4.3.1 | SUSE-SU-2019:1804-1 |
| SLES 12 SP5 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES 12 SP4 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES 12 SP3 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES 12 SP2 | yast2-ruby-bindings | 3.1.53-9.8.1 | SUSE-SU-2020:1570-1 |
| SLES for SAP 12 SP5 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES for SAP 12 SP4 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES for SAP 12 SP3 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES for SAP 12 SP2 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES for SAP 12 SP2 | yast2-ruby-bindings | 3.1.53-9.8.1 | SUSE-SU-2020:1570-1 |
| SUSE OpenStack Cloud Crowbar 8 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SUSE OpenStack Cloud 8 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SUSE OpenStack Cloud 7 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SUSE OpenStack Cloud 7 | yast2-ruby-bindings | 3.1.53-9.8.1 | SUSE-SU-2020:1570-1 |
| SUSE HPE Helion OpenStack 8 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SUSE Enterprise Storage 5 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | ruby-bundled-gems-rpmhelper | 0.0.2-lp151.2.1 | openSUSE-SU-2019:1771-1 |
| openSUSE Leap 15.1 | ruby2.5 | 2.5.5-lp151.4.3.1 | openSUSE-SU-2019:1771-1 |
| openSUSE Leap 15.0 | ruby-bundled-gems-rpmhelper | 0.0.2-lp151.2.1 | openSUSE-SU-2019:1771-1 |
| openSUSE Leap 15.0 | ruby2.5 | 2.5.5-lp151.4.3.1 | openSUSE-SU-2019:1771-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | ruby | 2.5.2-r0 | — |
| Alpine v3.23 | ruby | 2.5.2-r0 | — |
| Alpine v3.22 | ruby | 2.5.2-r0 | — |
| Alpine v3.21 | ruby | 2.5.2-r0 | — |
| Alpine v3.20 | ruby | 2.5.2-r0 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | ruby | 2.5.2-r0 | — |
| Alpine v3.18 | ruby | 2.5.2-r0 | — |
| Alpine v3.17 | ruby | 2.5.2-r0 | — |
| Alpine v3.16 | ruby | 2.5.2-r0 | — |
| Alpine v3.15 | ruby | 2.5.2-r0 | — |
| Alpine v3.14 | ruby | 2.5.2-r0 | — |
| Alpine v3.13 | ruby | 2.5.2-r0 | — |
| Alpine v3.12 | ruby | 2.5.2-r0 | — |
| Alpine v3.11 | ruby | 2.5.2-r0 | — |
| Alpine v3.9 | ruby | 2.5.2-r0 | — |
| Alpine v3.8 | ruby | 2.5.2-r0 | — |
| Alpine v3.7 | ruby | 2.4.5-r0 | — |
| Alpine v3.6 | ruby | 2.4.5-r0 | — |
| Alpine v3.5 | ruby | 2.3.8-r0 | — |
| Alpine v3.4 | ruby | 2.3.8-r0 | — |
Advisories 12
- RHSA-2020:2839 Red Hat Security Advisory: ruby security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2019:2028 Red Hat Security Advisory: ruby security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:3731 Red Hat Security Advisory: rh-ruby25-ruby security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:3729 Red Hat Security Advisory: rh-ruby23-ruby security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:3730 Red Hat Security Advisory: rh-ruby24-ruby security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:2769 Red Hat Security Advisory: ruby security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-3808-1 ruby1.9.1, ruby2.0, ruby2.3, ruby2.5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4332-1 ruby2.3 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1558-1 ruby2.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2019:1771-1 Security update for ruby-bundled-gems-rpmhelper, ruby2.5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1804-1 Security update for ruby-bundled-gems-rpmhelper, ruby2.5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1570-1 Security update for ruby2.1 SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://hackerone.com/reports/385070
- https://www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released/
- RHSA-2018:3729 vendor-advisory
- RHSA-2018:3730 vendor-advisory
- RHSA-2018:3731 vendor-advisory
- https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/
- DSA-4332 vendor-advisory
- USN-3808-1 vendor-advisory
- https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released/
- https://security.netapp.com/advisory/ntap-20190221-0002/
- https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396/
- https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released/
- [debian-lts-announce] 20181028 [SECURITY] [DLA 1558-1] ruby2.1 security update mailing-list
- 1042106 vdb-entry
- openSUSE-SU-2019:1771 vendor-advisory
- RHSA-2019:2028 vendor-advisory